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 Phillips Tapping Screw - Pan Head, #8 x 3/8" $12.60 Phillips Tapping Screw - Pan Head, #14 x 2" $45.91 Phillips Tapping Screws - Flat Head, #4 x 1" $14.93 Phillips Tapping Screw - Pan Head, #8 x 1" $21.73 Flat Washer, 1/2", .078" Thick, OD 1-3/8" $74.51