Online Parts Store › Stainless Countersunk Finishing Washer, #10 Image 1 of 1 Stainless Countersunk Finishing Washer, #10 $14.99 316 Stainless Steel. Add To Cart Added! 316 Stainless Steel. You Might Also Like Phillips Tapping Screw - Truss Head #8 x 1-1/2" $63.30 Lock Washer, 7/16" $32.06 Square Tapping Screw - Flat Head,#10 x 1-1/2" $62.54 Phillips Tapping Screws - Oval Head, #10 x 1-1/4" $28.85 Flat Washer, 5/16", .062" Thick, OD 7/8" $21.67