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 - Flat Head, #6 x 1-1/4" $15.93 Square Tapping Screw - Oval Head #8 x 1" $32.17 Phillips Self Drilling Screw - Pan Head #10 x 1" $41.63 Phillips Tapping Screw - Pan Head, #10 x 3" $37.54 Stainless Countersunk Finishing Washer, #1/4 $21.92