Online Parts Store › Phillips Machine Screw - Flat Head, 1/4"-20 x 3/4" Image 1 of 1 Phillips Machine Screw - Flat Head, 1/4"-20 x 3/4" $30.11 18-8 Stainless Steel. Add To Cart Added! 18-8 Stainless Steel. You Might Also Like Flat Washer, 5/16", .062" Thick, OD 7/8" $21.67 Flat Washer, 3/8", .062" Thick, OD 1" $38.36 Stainless Cotter Pin 1/16" x 1" $17.13 Phillips Tapping Screw - Pan Head, #10 x 1-1/2" $36.40 Phillips Tapping Screws - Flat Head, #12 x 2-1/2" $41.63