Online Parts Store › Phillips Machine Screw - Flat Head, 1/4"-20 x 1" Image 1 of 1 Phillips Machine Screw - Flat Head, 1/4"-20 x 1" $50.70 18-8 Stainless Steel. Add To Cart Added! 18-8 Stainless Steel. You Might Also Like Seachoice 01008 Lock Washer, #12 $16.44 Nylon Flat Washer 1/4", 0.56" Thick, OD 11/16" $24.88 Phillips Tapping Screws - Flat Head, #8 x 1/2" $12.41 Phillips Wood Screw - Flat Head, #10 x 2" $44.47 Phillips Tapping Screw - Truss Head #10 x 1-1/4" $50.76