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 Flat Washer, 1/2", .078" Thick, OD 1-3/8" $74.51 Blind Rivet, 1/8" x 3/8" $61.05 Phillips Tapping Screws - Oval Head, #12 x 2" $30.67 Phillips Tapping Screw - Pan Head, #8 x 3/8" $12.60 Stainless Cotter Pin 1/16" x 1/2" $9.76