Online Parts Store › Phillips Tapping Screws - Flat Head, #12 x 2-1/2" Image 1 of 1 Phillips Tapping Screws - Flat Head, #12 x 2-1/2" $41.63 18-8 Stainless Steel. Add To Cart Added! 18-8 Stainless Steel. You Might Also Like Phillips Tapping Screw - Truss Head #8 x 1/2" $18.52 Square Tapping Screw - Flat Head,#12 x 2" $49.38 Flat Washer, #10, .050" Thick, OD 9/16 $16.12 Nylon Insert Locknut - Stainless 5/16-24 $46.35 Phillips Tapping Screw - Pan Head, #14 x 3" $61.60