Hardened Washers

Hardened washers are precision-engineered flat washers, manufactured from carefully selected materials and heat-treated to enhance hardness and durability. The hardness of these washers makes them resistant to wear and able to handle heavy loads. They are ideal for use with high-strength bolts to ensure that assemblies maintain their integrity under very demanding conditions. Willie Washer offers a vast range of hardened parts, meeting industry standards such as ASTM F436 or the metric standard HV300, along with various OEM specifications. We also offer case-hardened washers, commonly available with a surface hardness of 15N 89.

Shop By
Material Finish Bolt Size (Metric) Bolt Size (Standard) Inside Diameter Outside Diameter Thickness Quantity in Stock Request a Quote
View Spring Steel - Hard Plain 1/4 0.281 1.500 0.125 7500 Add to Quote
View Alloy Steel - Hard Special Finish 1/4 0.281 2.000 0.089 770 Add to Quote
View Alloy Steel - Hard Zinc & Clear 1/4 0.281 2.000 0.089 730 Add to Quote
View Spring Steel - Hard Plain 1/4 0.281 2.500 0.062 3801 Add to Quote
View Spring Steel - Hard Plain 1/4 0.281 3.000 0.125 15 Add to Quote
View Spring Steel - Hard Zinc & Clear M7 1/4 0.287 1.765 0.098 2250 Add to Quote
View Spring Steel - Hard Zinc & Clear M7 1/4 0.287 1.765 0.099 1100 Add to Quote
View Spring Steel - Hard Zinc & Yellow M7 1/4 0.290 2.250 0.074 2400 Add to Quote
View Spring Steel - Hard Zinc & Clear M7 1/4 0.290 2.000 0.062 3400 Add to Quote
View Spring Steel - Hard Plain M7 1/4 0.295 0.625 0.093 31 Add to Quote
View Spring Steel - Hard Zinc & Clear M7 1/4 0.296 0.625 0.093 510 Add to Quote
View Alloy Steel - Hard Zinc & Yellow 5/16 0.315 2.500 0.125 615 Add to Quote

Industries That Use Hardened Washers

Hardened washers are often used in the construction industries for projects that require high-strength bolts, like bridges or other steel structures. Hardened washers are also used in:

  • Heavy equipment and machinery – for parts that are subjected to heavy loads or vibrations
  • Automotive – for components like suspension systems or engine assemblies
  • Industrial – to ensure precise assembly and load distribution

Request a Quote for Hardened Washers

Willie Washer is your trusted source for the hardened washers you require. Search our catalog, call us or fill out our contact form to request a quote or receive assistance with finding a hardened washer that meets your exact specifications. 

The Best Provider of Special Washers
& Stampings in the Fastener Industry

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