Online Parts Store › Phillips Tapping Screw - Truss Head #8 x 1/2" Image 1 of 1 Phillips Tapping Screw - Truss Head #8 x 1/2" $18.52 18-8 Stainless Steel. Add To Cart Added! 18-8 Stainless Steel. You Might Also Like Flat Washer, #10, .050" Thick, OD 9/16 $16.12 Phillips Tapping Screws - Flat Head, #8 x 5/8" $12.41 Nylon Insert Locknut - Stainless 5/16-24 $46.35 Lock Washer, M4 $10.20 Phillips Tapping Screw - Truss Head #10 x 1-1/4" $50.76