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 Screw - Pan Head, #12 x 1-1/2" $30.92 Blind Rivet, 1/8" x 1/4" $43.39 Square Tapping Screw - Flat Head,#10 x 1-1/2" $62.54 Phillips Tapping Screws - Flat Head, #4 x 1" $14.93 Stainless Cotter Pin 1/16" x 1" $17.13