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, #8 x 3/4" $19.21 Lock Washer,1/2" $24.75 Stainless Countersunk Finishing Washer, #8 $14.36 Square Tapping Screw - Oval Head #8 x 1-1/2" $54.12 Phillips Tapping Screws - Flat Head, #8 x 5/8" $12.41