Online Parts Store › Phillips Tapping Screws - Flat Head, #4 x 3/4" Image 1 of 1 Phillips Tapping Screws - Flat Head, #4 x 3/4" $13.73 18-8 Stainless Steel. Add To Cart Added! 18-8 Stainless Steel. You Might Also Like Phillips Wood Screw - Flat Head, #10 x 1-1/2" $44.84 Nylon Insert Locknut - Stainless 12-24 $75.96 Flat Washer, 5/16", .062" Thick, OD 9/16" (A/N Style) $10.20 Carriage Bolt, 1/2"-13 x 5" $49.07 Nylon Insert Locknut - Stainless 5/8-11 $35.08