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 Wood Screw - Flat Head, #10 x 2" $44.47 Square Tapping Screw - Oval Head #10 x 1-1/4" $57.05 Nylon Insert Locknut - Stainless 3/8-16 $28.40 Phillips Tapping Screw - Pan Head, #12 x 2" $30.36 Flat Washer, 1/2", .078" Thick, OD 1-1/4" $38.42