Online Parts Store › Phillips Machine Screw - Flat Head, 3/8"-16 x 2-1/2" Image 1 of 1 Phillips Machine Screw - Flat Head, 3/8"-16 x 2-1/2" $25.76 18-8 Stainless Steel. Add To Cart Added! 18-8 Stainless Steel. You Might Also Like Phillips Tapping Screws - Flat Head, #8 x 1-1/4" $19.34 Phillips Tapping Screw - Pan Head, #8 x 5/8" $18.01 Blind Rivet, 1/8" x 1/2" $71.23 Square Tapping Screw - Oval Head #8 x 3/4" $25.25 Square Tapping Screw - Flat Head,#10 x 1-1/2" $62.54