Online Parts Store › Stainless Countersunk Finishing Washer, #6 Image 1 of 1 Stainless Countersunk Finishing Washer, #6 $13.10 316 Stainless Steel. Add To Cart Added! 316 Stainless Steel. You Might Also Like Phillips Self Drilling Screw - Pan Head #10 x 1-1/4" $37.54 Flat Washer, 1/2", .078" Thick, OD 1-3/8" $74.51 Flat Washer, 1/4", .050" Thick, OD 11/16" $17.26 Phillips Tapping Screw - Truss Head #10 x 3/4" $31.18 Seachoice 01009 Lock Washer, 1/4" $13.60