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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
0.328 in.0.400 in.0.030 in.5/16Brass24500Part Detail/Quote
0.328 in.0.406 in.0.015 in.5/16Stainless - 300 Series0Part Detail/Quote
0.328 in.0.406 in.0.018 in.5/16Stainless - 300 Series50300Part Detail/Quote
0.330 in.0.406 in.0.031 in.5/16Rubber11501Part Detail/Quote
0.340 in.0.406 in.0.015 in.5/16PTFE15302Part Detail/Quote
0.343 in.0.406 in.0.009 in.5/16Low Carbon Steel - Soft17001Part Detail/Quote
0.344 in.0.406 in.0.010 in.5/16Low Carbon Steel - Soft41001Part Detail/Quote
0.370 in.0.413 in.0.020 in.5/16Low Carbon Steel - SoftPhosphate & Oil18500Part Detail/Quote
0.327 in.0.418 in.0.032 in.5/16Brass1601Part Detail/Quote
0.389 in.0.418 in.0.026 in.5/16Low Carbon Steel - Soft0Part Detail/Quote
0.328 in.0.420 in.0.016 in.5/16Brass4801Part Detail/Quote
0.328 in.0.422 in.0.005 in.5/16Stainless - 300 Series22500Part Detail/Quote
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