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 Flat Washer, 5/16", .062" Thick, OD 7/8" $52.44 Phillips Tapping Screws - Oval Head, #10 x 5/8" $28.59 Phillips Tapping Screws - Flat Head, #14 x 1-3/4" $36.21 Phillips Wood Screw - Flat Head, #8 x 3/4" $43.08 Phillips Tapping Screws - Flat Head, #8 x 1-1/4" $19.34