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 Stainless Cotter Pin $147.38 Nylon Insert Locknut - Stainless 10-32 $25.51 Stainless Countersunk Finishing Washer, #12 $18.89 Phillips Tapping Screw - Pan Head, #8 x 1-1/4" $27.71 Square Tapping Screw - Flat Head,#12 x 2" $49.38