Online Parts Store › Stainless Countersunk Finishing Washer, #5/16 Image 1 of 1 Stainless Countersunk Finishing Washer, #5/16 $22.42 18-8 Stainless Steel. Add To Cart Added! 18-8 Stainless Steel. You Might Also Like Phillips Tapping Screw - Pan Head, #14 x 3" $61.60 Seachoice 18-8 Stainless Steel Wing Nuts, 1/4-20 Size, Pack of 100 $110.41 Phillips Tapping Screw - Truss Head #8 x 1-1/4" $39.30 Phillips Tapping Screws - Flat Head, #8 x 3/4" $12.91 Phillips Wood Screw - Flat Head, #8 x 3/4" $43.08