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 Stainless Cotter Pin 1/16" x 1" $17.13 Phillips Tapping Screw - Pan Head, #12 x 1" $40.94 Stainless Countersunk Finishing Washer, #12 $18.89 Phillips Tapping Screws - Oval Head, #10 x 1" $27.33 Stainless Countersunk Finishing Washer, #8 $14.36