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 Phillips Tapping Screws - Flat Head, #14 x 3/4" $44.09 Phillips Tapping Screw - Truss Head #8 x 3/4" $17.19 Phillips Tapping Screws - Flat Head, #14 x 1-3/4" $36.21 Lag Screw, 3/8 x 3" $41.46 Square Tapping Screw - Flat Head,#10 x 2" $31.61