Online Parts Store › Phillips Machine Screw - Flat Head, 1/4"-20 x 3" Image 1 of 1 Phillips Machine Screw - Flat Head, 1/4"-20 x 3" $27.27 18-8 Stainless Steel. Add To Cart Added! 18-8 Stainless Steel. You Might Also Like Stainless Fender Washer 5/8", .109" Thick, OD 2" $37.03 Phillips Tapping Screws - Flat Head, #8 x 1" $18.01 Stainless Fender Washer #8, .050" Thick, OD 3/4" $21.67 Nylon Insert Locknut - Stainless 7/16-14 $21.10 Stainless Countersunk Finishing Washer, #10 $14.99