Online Parts Store › Phillips Tapping Screws - Flat Head, #4 x 1" Image 1 of 1 Phillips Tapping Screws - Flat Head, #4 x 1" $14.93 18-8 Stainless Steel. Add To Cart Added! 18-8 Stainless Steel. You Might Also Like Phillips Tapping Screw - Pan Head, #8 x 3/4" $19.21 Nylon Insert Locknut - Stainless 10-32 $25.51 Nylon Insert Locknut - Stainless 5/16-18 $18.01 Phillips Tapping Screw - Truss Head #10 x 1-1/4" $50.76 Nylon Flat Washer 1/2", 0.62" Thick, OD 1-1/4" $36.72