Online Parts Store › Flat Washer, 5/16", .062" Thick, OD 9/16" (A/N Style) Image 1 of 1 Flat Washer, 5/16", .062" Thick, OD 9/16" (A/N Style) $10.20 18-8 Stainless Steel. Add To Cart Added! 18-8 Stainless Steel. You Might Also Like Phillips Tapping Screws - Flat Head, #14 x 1-3/4" $36.21 Stainless Cotter Pin 5/32" x 2" $84.08 Phillips Tapping Screw - Pan Head, #8 x 2" $19.02 Square Tapping Screw - Flat Head,#10 x 2" $31.61 Phillips Tapping Screw - Pan Head, #10 x 3" $37.54