Online Parts Store › Phillips Tapping Screws - Flat Head, #4 x 1/2" Image 1 of 1 Phillips Tapping Screws - Flat Head, #4 x 1/2" $10.20 18-8 Stainless Steel. Add To Cart Added! 18-8 Stainless Steel. You Might Also Like Phillips Tapping Screws - Flat Head, #14 x 3" $59.58 Phillips Tapping Screw - Truss Head #10 x 1-1/4" $50.76 Phillips Tapping Screw - Pan Head, #14 x 3/4" $49.38 Stainless External Tooth Lock Washer 5/16" $19.48 Phillips Tapping Screws - Flat Head, #4 x 3/4" $13.73