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Flat Washers

Round flat washers are the most common type of washers supplied and they have the most uses. They are used to span oversized holes, and can spread loads over wider areas. They prevent surface damage and embedment from nuts and bolts, and provide a consistent surface for more predictable joints. They can also be used as shims to compensate for tolerance variations.

Willie Washer stocks over 60,000 different special washers for same day shipments. Check our inventory for various sizes, shapes, materials and finishes.

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Inner Diameter (ID)Outer Diameter (OD)Thickness (T)Bolt Size (Inch)MaterialFinishStockRequest a Quote
0.334 in.0.422 in.0.012 in.5/16Bronze6900Part Detail/Quote
0.360 in.0.425 in.0.032 in.5/16Brass38001Part Detail/Quote
0.375 in.0.430 in.0.020 in.5/16Aluminum32502Part Detail/Quote
0.360 in.0.435 in.0.010 in.5/16Nylon19800Part Detail/Quote
0.328 in.0.437 in.0.010 in.5/16Low Carbon Steel - Soft34000Part Detail/Quote
0.328 in.0.437 in.0.010 in.5/16Low Carbon Steel - SoftZinc & Clear8900Part Detail/Quote
0.328 in.0.437 in.0.010 in.5/16Stainless - 300 Series0Part Detail/Quote
0.328 in.0.437 in.0.020 in.5/16Brass0Part Detail/Quote
0.328 in.0.437 in.0.032 in.5/16Brass200Part Detail/Quote
0.328 in.0.437 in.0.032 in.5/16Low Carbon Steel - SoftZinc & Clear0Part Detail/Quote
0.328 in.0.437 in.0.032 in.5/16Stainless - 300 Series54800Part Detail/Quote
0.328 in.0.437 in.0.036 in.5/16Copper10895Part Detail/Quote
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