Washers are flat, thin, and disc-shaped components that are used to distribute the load of a threaded fastener, such as a bolt or nut. They are typically placed between the fastener and the mating surface to prevent damage, distribute pressure, and provide stability. Washers can also be used to reduce friction and act as spacers.
Plain Washers : These are flat washers with a simple, smooth design. They are used to distribute loads and prevent damage to the material surface.
Lock Washers : These washers have serrations or other locking features designed to prevent loosening of the fastener due to vibration or rotation.
Spring Washers : Also known as Belleville washers, these are conical-shaped washers that provide spring-like action to compensate for loosening caused by vibrations.
Split Washers : These washers have a split cut, creating a helical shape. They are used to create tension and prevent loosening.
Fender Washers : These have a larger outer diameter compared to standard washers, providing a larger surface area for distributing loads. They are often used in automotive applications.
Square Washers : These washers have a square shape and are used with square-section fasteners.
When selecting washers, it's essential to consider the type of fastener, the material of the washer, and the specific requirements of your application. Additionally, ensure that the washer size matches the fastener size for proper functionality.
Washers Din Chart |
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| DIN / IS / USS / BS / JIS / ASTM / NF / CHARTS - TECHNICAL SPECIFICATIONS | |
| 1 | DIN 125 A (ISO 7089) Plain Washer without chamfer |
| 2 | DIN 125 B (ISO 7090) Plain Washer with chamfer |
| 3 | DIN 126 Plain Washer (ISO 7091) |
| 4 | DIN 9021 Plain Washer |
| 5 | DIN 440 R Washer for Wood Constructions |
| 6 | DIN 7349 Heavy Duty Plain Washer |
| 7 | DIN 433 Plain Washer for cheese head screws |
| 8 | IS 2016 |
| 9 | USS STANDARD WASHER |
| 10 | DIN 127 SPRING LOCK WASHER |
| 11 | DIN 128 SPRING LOCK WASHER, CURVED AND WAVE |
| 12 | DIN 434 Square Taper Washers |
| 13 | DIN 435 Square Taper Washers |
| 14 | DIN 1440 (ISO 8738) Plain washer, medium type for clevis pins |
| 15 | DIN 440v Washers for wooden constructions |
| 16 | DIN 6903-Flat-Washers |
| 17 | DIN 6916-Hardness-Flat-Washers |
| 18 | DIN 7349 Heavy Duty Plain Washer |
| 19 | DIN 7989 Flat Washer |
| 20 | BS 4320 Flat Washer A, B |
| 21 | BS 4320 Flat Washer C, D |
| 22 | JIS B 1186 Hardened Flat Washer |
| 23 | JIS B 1256 Flat Washer |
| 24 | NF E25-513 Z,M Hardened Flat Washer |
| 25 | NF E25-513 L,LL Flat Washer |
| 26 | ASTM F436 (1985) Hardened Washer |
| 27 | ASTM F436M Hardened Washer |
| 28 | AS NZS 1252 Flat Washer |
| 29 | BS 4395 Washer / High Strength Friction Grip Washers / HSFG Washers |
| 30 | High Strength Structural Washers |
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