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 Stainless Countersunk Finishing Washer, #1/4 $21.92 Phillips Tapping Screw - Pan Head, #10 x 3/4" $32.06 Phillips Tapping Screws - Flat Head, #8 x 3/8" $11.90 Phillips Tapping Screws - Oval Head, #12 x 2-1/2" $39.93 Phillips Tapping Screws - Flat Head, #14 x 3" $59.58