Online Parts Store › Phillips Tapping Screws - Flat Head, #12 x 3" Image 1 of 1 Phillips Tapping Screws - Flat Head, #12 x 3" $42.89 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,#10 x 2" $31.61 Nylon Insert Locknut - Stainless 5/8-11 $35.08 Nylon Insert Locknut - Stainless 5/16-18 $18.01 Flat Washer, 1/2", .078" Thick, OD 1-3/8" $74.51