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 Screw - Pan Head, #8 x 5/8" $18.01 Phillips Tapping Screws - Flat Head, #8 x 5/8" $12.41 Phillips Tapping Screw - Pan Head, #8 x 1-1/4" $27.71 Stainless Cotter Pin 3/32" x 1" $46.14 Flat Washer, #4, .032" Thick, OD 5/16" $6.74