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 Flat Washer, #10, .050" Thick, OD 9/16 $16.12 Seachoice 01531 Hex Nut, 3/8-16 $30.68 Stainless External Tooth Lock Washer #10 $14.42 Nylon Insert Locknut - Stainless 1/4-20 $27.84 Seachoice 01006 Lock Washer, #8 $15.43