Online Parts Store › Phillips Tapping Screws - Flat Head, #8 x 1/2" Image 1 of 1 Phillips Tapping Screws - Flat Head, #8 x 1/2" $12.41 18-8 Stainless Steel. Add To Cart Added! 18-8 Stainless Steel. You Might Also Like Phillips Tapping Screws - Oval Head, #10 x 5/8" $28.59 Stainless Cotter Pin $147.38 Phillips Tapping Screws - Oval Head, #12 x 1-1/4" $22.30 Nylon Insert Locknut - Stainless 3/8-16 $28.40 Nylon Insert Locknut - Stainless 1/2-13 $35.14