Online Parts Store › Stainless Countersunk Finishing Washer, #4 Image 1 of 1 Stainless Countersunk Finishing Washer, #4 $13.29 316 Stainless Steel. Add To Cart Added! 316 Stainless Steel. You Might Also Like Phillips Tapping Screws - Oval Head, #10 x 2" $27.33 Stainless Cotter Pin 1/8" x 2" $18.81 Phillips Tapping Screw - Truss Head #10 x 1" $33.32 Phillips Self Drilling Screw - Pan Head #10 x 1-1/4" $37.54 Phillips Tapping Screw - Pan Head, #12 x 3/4" $37.60