Online Parts Store › Stainless Countersunk Finishing Washer, #12 Image 1 of 1 Stainless Countersunk Finishing Washer, #12 $18.89 316 Stainless Steel. Add To Cart Added! 316 Stainless Steel. You Might Also Like Phillips Tapping Screws - Oval Head, #10 x 1-1/4" $28.85 Stainless Fender Washer #8, .050" Thick, OD 3/4" $21.67 Phillips Tapping Screws - Oval Head, #10 x 2-1/2" $29.85 Flat Washer, 5/16", .062" Thick, OD 9/16" (A/N Style) $10.20 Stainless Fender Washer #10, .062" Thick, OD 1" $48.06