Online Parts Store › Phillips Machine Screw - Flat Head, 1/4"-20 x 4" Image 1 of 1 Phillips Machine Screw - Flat Head, 1/4"-20 x 4" $41.25 18-8 Stainless Steel. Add To Cart Added! 18-8 Stainless Steel. You Might Also Like Phillips Self Drilling Screw - Pan Head #10 x 3/4" $36.40 Stainless Cotter Pin 1/8" x 2" $18.81 Stainless Countersunk Finishing Washer, #1/4 $21.92 Phillips Tapping Screws - Flat Head, #8 x 1" $18.01 Flat Washer, 5/16", .062" Thick, OD 7/8" $52.44