Online Parts Store › Phillips Machine Screw - Flat Head, 1/4"-20 x 1-1/2" Image 1 of 1 Phillips Machine Screw - Flat Head, 1/4"-20 x 1-1/2" $31.36 18-8 Stainless Steel. Add To Cart Added! 18-8 Stainless Steel. You Might Also Like Phillips Tapping Screw - Pan Head, #14 x 3" $61.60 Phillips Tapping Screws - Oval Head, #10 x 2" $27.33 Phillips Tapping Screws - Flat Head, #6 x 1-1/4" $15.93 Stainless Cotter Pin 1/8" x 1-1/4" $65.75 Flat Washer, #4, .032" Thick, OD 5/16" $6.74