Online Parts Store › Stainless Countersunk Finishing Washer, #1/4 Image 1 of 1 Stainless Countersunk Finishing Washer, #1/4 $21.92 316 Stainless Steel. Add To Cart Added! 316 Stainless Steel. You Might Also Like Phillips Tapping Screws - Flat Head, #8 x 5/8" $12.41 Phillips Tapping Screw - Pan Head, #12 x 3/4" $37.60 Phillips Tapping Screw - Pan Head, #10 x 3" $37.54 Seachoice 01531 Hex Nut, 3/8-16 $30.68 Nylon Insert Locknut - Stainless 5/8-11 $35.08