YONGYI FASTENERS

You need the best spring washer for your job. In 2026, the main options are DIN127B/GB Split Lock Washer, Belleville Disc Spring Washer, and Copper Pad Spring Washer. Each spring washer is made from a different material. Each one has its own special use. The DIN127B/GB Split Lock Washer stops parts from shaking loose. The Belleville Disc Spring Washer can hold heavy things. The Copper Pad Spring Washer lets electricity flow well. You should pick a spring washer based on your needs. You may want to stop parts from loosening, carry weight, or help electricity move. Choosing the right spring washer keeps things from breaking. It also makes your project work better.

Spring Washer Comparison Table

Key Features Overview

You might wonder how spring washers are different. Each one has its own shape and job. DIN127B/GB Split Lock Washer has a split ring. It grips bolts so they do not come loose. Belleville Disc Spring Washer is shaped like a cone. This shape lets you change how tight it is. Copper Pad Spring Washer is flat and soft. It works well in electrical things. The table below shows the main differences.

Tip: You can read more about spring washers and lock washers on Wikipedia.

Material & Load Capacity

Spring washers are made from different materials for their jobs. DIN127B/GB Split Lock Washer is usually steel with a zinc coat. This stops rust and keeps it strong. Belleville Disc Spring Washer is made from carbon steel or stainless steel. These metals let it hold heavy things and last in tough places. Copper Pad Spring Washer is made from copper. Copper is soft and lets electricity move easily. You should pick the right material for your job.

You see Belleville washers in wind turbines and solar panels. These washers do not rust and can hold a lot of weight. DIN127B/GB Split Lock Washer is good for machines and cars. Copper Pad Spring Washer is best for electrical things, like EV battery packs, where you need electricity to flow.

Applications & Pros/Cons

Spring washers help with different problems. DIN127B/GB Split Lock Washer is used to keep bolts from coming loose. Belleville Disc Spring Washer spreads out weight and keeps things tight. Copper Pad Spring Washer is best for electric connections.

You will have different problems in each case. If you need to stop shaking, use DIN127B/GB Split Lock Washer. If you need to hold heavy things, use Belleville Disc Spring Washer. If you need electricity to move, use Copper Pad Spring Washer. Pick the washer that fits your job for the best results.

Types of Lock Washers Explained

Understanding the types of lock washers helps you make better choices for your projects. You see many options, but not all washers work the same way. Some washers stop bolts from loosening. Others spread out force or help with electrical contact. You need to know the differences to pick the right one.

Spring Washer Types

Spring washers use their shape to give tension. This tension keeps bolts tight even when things shake or move. The DIN127B/GB split lock washer is a common spring washer. It has a split ring that grips the bolt. Belleville disc spring washers look like cones. They handle heavy loads and keep pressure even if parts move. Copper pad spring washers are flat but still act like springs. They work well in electrical systems.

You find spring washers in machines, cars, and electrical panels. They help when you need vibration resistance or want to keep a connection tight. You should use spring washers when you want to stop nuts and bolts from coming loose.

Lock Washer Types

Lock washers include many designs. The main goal is to stop fasteners from turning or slipping. You see several types of lock washers in the market. The most common types of lock washers are split lock washers, internal tooth lock washers, and external tooth lock washers.

Split lock washers have a cut that bites into the bolt and surface.

Internal tooth lock washers have teeth on the inside edge. These teeth grip the screw head or nut. You use them when you want a clean look or need to protect the outside surface.

External tooth lock washers have teeth around the outside edge. These washers grip the mounting surface. You use them when you want more holding power.

You find internal tooth lock washers in electronics and light-duty assemblies. External tooth lock washers work well in electrical panels and automotive parts. Both types of lock washers help stop vibration and rotation.

Here is a quick look at how standards classify washers:

You see that spring washers and lock washers have their own standards. This helps you choose the right washer for your job.

Plain Washer Types

Plain washers do not lock or add tension. They spread out the load from a bolt or screw. You use plain washers to protect surfaces or fill gaps. They do not stop bolts from turning or coming loose. You find plain washers in furniture, plumbing, and construction.

You should not use plain washers when you need vibration resistance or locking. For those jobs, you need the right types of lock washers. If you want to stop movement, use internal tooth lock washers or external tooth lock washers. If you only need to spread force, a plain washer works best.

Tip: Always match the washer type to your application. This keeps your assembly safe and reliable.

DIN127B/GB Split Lock Washer

Design & Features

You see split lock washers in lots of machines and cars. The special shape helps parts stay tight. The washer has a helical cut. This cut lets it open and close in a circle. The shape helps the washer grip the nut and the surface. When you tighten the bolt, the washer gets flat. It keeps pressure and holds the bolt in place. This design stops parts from getting loose when things shake. You can use split lock washers when you need things to stay tight. The washer works well in places with movement or shaking.

The helical cut lets the washer open and close.

The washer keeps pressure as it gets flat.

The shape stops loosening when things vibrate.

You find split lock washers in cars, machines, and building work. You can use them for jobs with medium weight. The zinc coat keeps the washer from rusting. You get a strong washer for your project.

Strengths

You get many good things when you use split lock washers. The washer stops bolts from getting loose when things shake. You do not have to worry about bolts coming out in moving machines. The washer keeps pressure for a long time. You get good results in jobs that need to stay tight. The zinc coat stops rust. You can use the washer outside or in wet places. The washer comes in many sizes, so you can pick what you need.

Stops bolts from getting loose when things shake.

Keeps pressure and stops loosening.

Zinc coat keeps the washer from rusting.

Many sizes fit different jobs.

You can use split lock washers in car engines, big machines, and tools for building. You feel safe knowing your parts stay tight. You do not need to check bolts all the time.

Weaknesses

You should know some weak points of split lock washers. If things shake very fast, the washer can lose pressure after a while. You need to check parts that move a lot. If you do not put the washer in right, it can fail. You must put the washer in the right way to work well. The washer may not work for very heavy jobs. For heavy jobs, you can use belleville washers. Belleville washers hold more weight and keep pressure in hard jobs.

Can lose pressure if things shake a lot.

Can fail if not put in right.

You need to pick the right washer for your job. If you need to hold heavy things, belleville washers are better. If you need electricity to move, copper pad washers are good. You get the best results when you pick the right washer.

Best Uses

You want your projects to stay safe and tight. The DIN127B/GB Split Lock Washer is a good choice for many jobs. You can use this washer where things shake or move. It helps stop bolts or nuts from getting loose. The split shape grabs tight and keeps pressure. This means you do not have to worry about parts falling apart.

Common Application Scenarios:

Machinery and Equipment: 
You see these washers in big machines. They keep bolts tight when motors run or parts move. You can use them in conveyor belts, pumps, and compressors. The washer helps stop problems from loose bolts.

Automotive and Transportation: 
You need strong parts in cars and trucks. The split lock washer works well in vehicles. It keeps engine parts and other bolts tight. You feel safe on bumpy roads or long trips.

Construction and Structural Projects: 
You want buildings to stay strong. The washer stops bolts from getting loose from wind or shaking. You can use it in steel frames, scaffolds, and big anchors.

Home Repairs and DIY Projects: 
You can use split lock washers for fixing things at home. They help fix chairs, shelves, or tools. You get an easy way to make repairs last longer.

When to Choose This Washer:

You should pick this washer when you want strength and easy use. It works best for medium weight and places that shake. You do not need special tools to use it. You can trust it for work or home jobs.

Pain Points Solved:

You stop expensive fixes from loose bolts.

You lower the chance of accidents from parts coming off.

You save time because the washer keeps pressure longer.

Belleville Disc Spring Washer

Design & Features

You see the Belleville disc spring washer shaped like a shallow cone. This shape gives it special power. When you press the washer, it flattens and pushes back. You get a strong spring effect in a small space. The washer sits between the bolt head and the surface. You can stack these washers to change how much force they give. You can place them in the same direction for more load or alternate them for more movement.

The Belleville washer uses strong metals like carbon steel or stainless steel. These metals help the washer keep its shape and strength. You find sizes from small to very large. This lets you use them in many projects. The washer resists rust if you pick the right metal. You can use it outside or in wet places.

Tip: 
You can adjust the force by stacking Belleville washers in different ways.

Strengths

You get many benefits when you use Belleville disc spring washers:

Handles Heavy Loads: 
The washer supports high pressure in a small area. You can use it where bolts need to stay tight under big weight.

Maintains Tension: 
The washer keeps pressure even if parts move or change shape. You do not lose grip when things heat up or cool down.

Saves Space: 
The washer gives strong force without taking up much room. You can use it in tight spots.

Flexible Use: 
You can stack washers to get the force you want. This helps you match the washer to your job.

Resists Corrosion: 
Stainless steel Belleville washers work well in wet or outdoor places.

You see these washers in wind turbines, bridges, and machines that shake or change temperature. You solve problems with loosening and shifting parts.

Weaknesses

You should know some limits of Belleville disc spring washers:

Needs Careful Installation: 
You must place the washer the right way. If you do not, it may not work well.

Can Cost More: 
The washer uses strong metals and special shapes. This can make it more expensive than simple washers.

May Not Fit All Bolts: 
The washer has a special shape. It may not fit every bolt or surface.

Possible Overload: 
If you use too much force, the washer can flatten and lose its spring.

Note: 
Always check the washer size and stacking method before you start your project.

You should pick Belleville disc spring washers when you need strong, steady pressure in tough jobs. You get better results in heavy-duty and high-vibration places.

Best Uses

You want to fix hard fastening problems. The Belleville disc spring washer is a smart way to keep bolts tight in tough places. You can use this washer when you need strong pressure for a long time.

Where Belleville Disc Spring Washers Excel:

Heavy Machinery and Equipment: 
You see these washers in big machines and robots. The washer holds heavy loads and does not lose pressure. It keeps bolts tight even when machines work all day.

Wind Turbines and Renewable Energy: 
You need parts to stay tight in wind turbines. The Belleville washer stops loosening from shaking and heat changes. It works well in towers, solar panels, and other energy systems.

Aerospace and Transportation: 
You want safety in planes, trains, and trucks. The washer keeps bolts tight during takeoff, landing, or bumpy roads. It helps stop bolts from failing in important places.

Bridges and Structural Joints: 
You use Belleville washers in bridges and steel frames. The washer keeps pressure even when metal gets bigger or smaller. It stops joints from getting loose from weather or heavy cars.

Electrical and Power Systems: 
You need good connections in switchgear, transformers, and power grids. The washer keeps pressure on electric parts. It helps stop overheating and power loss from loose parts.

Tip: 
Pick Belleville disc spring washers when you need bolts to stay tight with changing weight or heat.

Pain Points Solved by Belleville Washers:

You stop bolts from getting loose when things shake.

You keep pressure even when parts get hot or cold.

You do not need to fix things often because the washer holds pressure.

You save space because the washer gives strong force in a small spot.

Common Application Table

You should use Belleville disc spring washers for hard jobs. The washer helps keep bolts tight and safe. You feel good knowing your project will last, even in tough places.

Note: 
Always check the washer size and how you stack them. You get the best results when you match the washer to your job.

If you want a washer that holds heavy loads, stops shaking, and keeps pressure with heat changes, the Belleville disc spring washer is the best pick.

Copper Pad Spring Washer

Design & Features

You find copper pad spring washers in electrical gear and delicate machines. The washer is flat and round. Copper makes it soft and lets electricity move well. You put the washer between the bolt and the thing you want to connect. The washer acts like a cushion and spreads out the force. This helps keep the connection steady and safe for fragile parts.

Copper pad spring washers do not rust easily. You can use them outside or in damp places. The washer’s spring shape keeps the bolt tight. This stops connections from getting loose and keeps things working right. You can get these washers in sizes for tiny gadgets or big power systems.

Tip: 
Pick copper pad spring washers if you need good electrical contact and want to stop shaking.

Strengths

Copper pad spring washers have many good points. They let electricity flow well. The washer makes a strong path for electric current. This helps circuits and battery packs work better. The soft copper does not scratch or hurt surfaces. It keeps weak parts from breaking or wearing out.

The washer also helps with shaking. It soaks up bumps and keeps bolts tight. You do not have to fix things as often if your machine moves a lot. Copper does not rust or turn dull fast. You get a washer that lasts a long time, even in tough places.

Key Benefits Table

You use copper pad spring washers in EV battery packs, switchgear, and control panels. The washer helps stop loose connections and bad electricity flow.

Weaknesses

You should know what copper pad spring washers cannot do. The washer is best for light or medium weight. It does not hold up heavy machines well. Copper is softer than steel. If you use too much force, the washer can bend. It may wear out faster if you use it for hard jobs.

You need to make sure the washer works with your bolts and surfaces. Copper can mix with other metals and cause stains or rust. The washer costs more than regular steel washers. You need to think about how much you want to spend.

Note: 
Always pick the right washer for your job. This helps you avoid problems like bending, wearing out, or rust.

You get the best results when you use copper pad spring washers for electric work and light jobs. You keep your machines safe and make them work better.

Best Uses

You might wonder where copper pad spring washers work best. These washers are great for jobs that need good electrical contact and gentle force. They also help when things shake or move. You see them in many places, like electronics and cars. They work well where other washers might not.

Top Application Scenarios

Electrical Connections: 
You use copper pad spring washers in switchgear, circuit boards, and battery packs. The washer keeps the connection steady. It lets electricity move without stopping. You do not lose power or get too much heat.

EV Battery Assemblies: 
You need safe and steady connections in electric vehicles. Copper pad washers keep battery terminals tight. This helps batteries work better and last longer.

Sensitive Instruments: 
You protect weak parts in medical devices, sensors, and control panels. The soft copper does not scratch or hurt surfaces. Your equipment works well and you do not need expensive repairs.

Automotive Electronics: 
You find copper pad washers in car dashboards, sensors, and wiring harnesses. The washer does not rust and keeps connections strong. You have fewer problems with wires.

Renewable Energy Systems: 
You use copper pad washers in solar panels and wind turbines. The washer keeps bolts tight and lets electricity flow. You get steady power and do not need to fix things often.

Tip: 
Pick copper pad spring washers when you need both electrical conductivity and vibration resistance. They are a good choice for delicate and high-tech jobs.

Pain Points Solved

You do not have problems like loose wires or broken surfaces. You do not need to fix things as much. You save time and money by picking the right washer.

Who Should Use Copper Pad Spring Washers?

Electricians working on control panels

Engineers making EV battery packs

Technicians fixing medical devices

Mechanics working on car electronics

Installers putting in solar or wind systems

You get the best results when you use the right washer for your job. Copper pad spring washers help you make things safer and last longer.

⚡ Note: 
Always check the washer size and thickness for your project. You get the best results when you use the right fit.

You make smart choices by using copper pad spring washers for jobs that need good electricity flow, gentle force, and vibration resistance. Your projects work well and you do not have surprise problems.

Spring Washer Performance Analysis

Durability

You want your spring washers to last a long time. How long they last depends on what they are made of, their shape, and how well they handle shaking. ASTM F436 says steel washers are tougher than softer metals. This keeps them safe from water and rust. You can use these washers in machines that run every day. They keep things tight even when the machine shakes.

Belleville Disc Spring Washers are made from carbon or stainless steel. These metals are very strong. You see these washers in wind turbines and bridges. They hold tight under heavy weight. They do not get tired from shaking over and over. You can stack Belleville washers to make them last longer. This helps when you need more grip or want to spread out the weight.

Copper Pad Spring Washers are made from copper. Copper does not rust and lets electricity move easily. You find these washers in EV battery packs and control panels. They work best for light or medium weight. Copper washers soak up shaking well. They keep weak parts safe from damage. You get a washer that lasts a long time in electric jobs.

Expert Opinion: 
The National Institute of Standards and Technology (NIST) says steel washers last longer in tough places. Copper washers are great for electric jobs but may wear out faster if used for heavy work.

You should pick a washer that fits where you will use it. If things shake a lot, steel washers last longer. If you need good electricity flow, copper washers are best.

Cost

You want to get good washers without spending too much. The price depends on what the washer is made of, how it is made, and how well it handles shaking. Steel washers cost less than special metals. DIN127B/GB Split Lock Washers are a good deal. You get strong grip and shaking protection for a fair price.

Belleville Disc Spring Washers cost more money. You pay extra because they can hold heavy things and last a long time. You use these washers for important jobs where bolts must not come loose. The higher price means you do not have to fix things as often.

Copper Pad Spring Washers cost more than steel ones. The price of copper can go up and down. You pay more because copper lets electricity move and does not rust. You use copper washers in electric jobs. The price is worth it when you need safe power and shaking protection.

Tip: 
You save money by picking the right washer for your job. You do not have to fix things as much when you use the right washer.

Installation

You want washers that are easy to put in. Spring washers must fit your bolts and the surface. You put the washer under the bolt head. You tighten the bolt. The washer grabs and holds tight. You do not need special tools. You use these washers for home fixes and machines.

Belleville Disc Spring Washers need more care. You can stack them for more grip or movement. You must check which way you stack them. You use these washers in bridges and wind turbines. They give strong shaking protection. You need to follow the guide to put them in right.

Copper Pad Spring Washers are easy to use. You put the washer under the bolt. You tighten the bolt. The washer keeps things tight and protects surfaces. You use these washers in electric panels and EV battery packs. You get good electricity flow and shaking protection.

Note: 
You get better results when you put washers in the right way. This keeps things tight and stops shaking from causing problems.

You need to think about how shaking affects how you put in washers. You want washers that stay tight and do not come loose. You do not want to fix things all the time. You get the best results when you pick the right washer for your job.

Environmental Suitability

You need to know how each spring washer works in different places. Picking the right one helps your project last longer and stay safe.

1. DIN127B/GB Split Lock Washer

This washer is made from zinc-coated steel. The zinc coat stops rust in most indoor and outdoor spots. The zinc keeps water and air away from the steel. You can use this washer in damp shops, garages, or outside on building frames. It handles shaking well, so machines and cars stay safe. Do not use it with strong acids or salty water for a long time. These things can wear away the zinc coat.

2. Belleville Disc Spring Washer

Belleville washers are made from carbon steel or stainless steel. Stainless steel does not rust and works well outside or in wet places. Carbon steel is strong for heavy loads but needs a special coat outside. You can use Belleville washers in wind turbines, bridges, and machines that face rain, snow, or heat. They handle big changes in temperature and keep bolts tight. Pick stainless steel if you want the best rust protection.

3. Copper Pad Spring Washer

Copper pad washers let electricity move easily. You use them in control panels, battery packs, and places with lots of wires. Copper does not rust, so you can use these washers in wet or humid places. They work well in electric cars, solar panels, and outdoor power boxes. Copper handles shaking and gentle movement but bends if you use too much force. Do not use copper washers with strong chemicals or salty water. These can stain or weaken the washer.

Tip: 
Always pick the washer material that fits your environment. This stops rust, keeps things strong, and saves money on repairs.

Comparison Table: Environmental Suitability

Pain Points Solved

You stop bolts from rusting in wet places.

You keep electrical connections safe in humid air.

You avoid loose parts in machines that shake or heat up.

You lower the risk of failure in outdoor projects.

You should always check the place before you pick a washer. The right washer saves you time, money, and worry.

Choosing the Right Spring Washer

Heavy Load Applications

It is hard to find the right washer for heavy jobs. Not all washers can handle big pressure or keep bolts tight. You need a washer that stays strong and does not bend. Belleville washers are good for holding heavy things. Their cone shape works like a spring and keeps parts together. You can use them in bridges, wind turbines, or big machines. These washers keep things tight even if parts get bigger or smaller.

You might also see wave spring washers in some machines. They have a wavy shape that helps hold pressure and take in movement. Both types are good when you want to stop shaking and keep bolts tight. If you need a washer for tough jobs, pick one that fits your project’s force and space.

Recommended for Heavy Loads:

Belleville disc spring washer

Wave spring washer

Tip: Always check the washer size and how you stack them. This helps you get the best fit and makes the washer last longer.

Vibration Resistance

You want your bolts to stay tight when things shake or move. Shaking can make bolts come loose and cause problems. You need fasteners that fight shaking and keep everything safe. DIN127B/GB split lock washers are great for this. Their split shape grabs the bolt and the surface. This stops turning and loosening. You see these washers in engines, pumps, and moving machines.

Belleville washers also help with shaking, especially when things are heavy and move a lot. Their spring shape keeps pressure on the joint, even if parts move. Copper pad spring washers can also fight shaking in electric systems. They keep things tight and let electricity flow.

Best Choices for Vibration Resistance:

DIN127B/GB split lock washer (machines, cars)

Belleville disc spring washer (heavy, moving machines)

Copper pad spring washer (electric panels, EV battery packs)

Note: Use the right washer for how much things shake. This means you do not have to fix things as much and keeps your project safe.

Electrical Conductivity

You need washers that let electricity move well in electric work. Copper pad spring washers are best for this. They let electricity flow and keep the connection safe. The soft copper does not hurt weak parts and keeps power moving. You find these washers in EV battery packs, switchgear, and control panels. They also fight shaking, so connections stay tight for a long time.

DIN127B/GB split lock washers and Belleville washers do not let electricity move as well as copper. Only use them if you do not need a strong electric path. For sensitive electronics or power systems, always pick copper pad spring washers.

Top Picks for Electrical Conductivity:

Copper pad spring washer (best for electric contact)

Use only if you need both electricity flow and shaking resistance

⚡ Tip: Always pick the washer material that matches your electric needs. This stops power loss and keeps your system working well.

Budget Considerations

You want to get the best value for your project. You need to balance cost with performance. Each spring washer type has a different price and benefit. You should look at your needs before you decide.

DIN127B/GB Split Lock Washer gives you strong vibration resistance at a low to medium price. You can use it in many machines and vehicles. You do not pay much, but you get good protection against loosening.

Belleville Disc Spring Washer costs more. You pay for its ability to handle heavy loads and tough jobs. You should pick this washer if you need high strength and long life. The extra cost saves you money on repairs and downtime.

Copper Pad Spring Washer sits in the medium to high price range. You pay more for electrical conductivity and corrosion resistance. You should use this washer in electric systems or places with moisture.

💡 Tip: 
You save money when you match the washer to your job. Do not buy a heavy-duty washer for a light task. Do not use a cheap washer where safety matters.

Here is a quick table to help you compare:

You should always check your budget and your project’s needs. You get the best results when you choose the right washer for the right job.

General Purpose

You may need a washer for many different jobs. You want something that works well in most cases. You do not want to worry about special needs or high costs. You should look for a washer that gives you balance.

DIN127B/GB Split Lock Washer fits most general uses. You get good vibration resistance and rust protection. You can use it in machines, cars, home repairs, and building projects. You do not need special tools or skills. You can trust it for most medium-load jobs.

If you work with electricity, Copper Pad Spring Washer gives you both conductivity and some vibration resistance. You can use it in control panels, battery packs, and electronics. You get safe connections and less risk of loose parts.

For heavy-duty or high-stress jobs, Belleville Disc Spring Washer gives you extra strength. You should use it only if your project needs more force or faces big temperature changes.

🛠️ Note: 
For most everyday tasks, you can start with a DIN127B/GB Split Lock Washer. If you see special needs, switch to Belleville or Copper Pad types.

Quick Guide for General Use:

Pick DIN127B/GB Split Lock Washer for most machines and repairs.

Use Copper Pad Spring Washer for electric jobs.

Choose Belleville Disc Spring Washer for heavy or critical work.

You make your projects safer and longer-lasting when you match the washer to the job. You avoid wasted money and time by picking the right type from the start.

You now know what each spring washer does best. Use a DIN127B/GB split lock washer if you need to stop shaking. Pick a Belleville disc spring washer when you have heavy things to hold. Choose a copper pad spring washer if you need electricity to move well. Before you pick a washer, check this expert list:

Pick the washer that matches your project for the best results.

FAQ

What is the main purpose of a spring washer?

You use a spring washer to keep bolts tight. It stops parts from loosening when things shake or move. The washer adds tension and helps your assembly stay secure.

How do I choose the right spring washer for my project?

Check your project’s needs. If you need vibration resistance, pick a split lock washer. For heavy loads, use a Belleville washer. For electrical jobs, choose a copper pad washer.

Can I use spring washers outdoors?

You can use spring washers outdoors. Zinc-coated and stainless steel washers resist rust. Copper washers work well in humid places. Always check the material for your environment.

Do spring washers work with all bolt sizes?

Spring washers come in many sizes. You must match the washer to your bolt. If the washer is too small or too big, it will not work well.

Are spring washers reusable?

You can reuse spring washers if they are not bent or worn. Always check for damage before using them again. Replace washers that look weak or misshaped.

What is the difference between a spring washer and a lock washer?

A spring washer uses its shape to add tension. A lock washer uses teeth or cuts to grip the bolt and surface. Both help stop loosening, but they work in different ways.

Do copper pad spring washers affect electrical performance?

Copper pad spring washers improve electrical performance. They let electricity flow easily and keep connections tight. You get safer and more reliable circuits.

How do I install a spring washer correctly?

Place the washer under the bolt head. Tighten the bolt so the washer flattens and grips. Make sure the washer fits the bolt and surface for best results.