Online Parts Store › Phillips Machine Screw - Flat Head, 5/16"-18 x 2" Image 1 of 1 Phillips Machine Screw - Flat Head, 5/16"-18 x 2" $35.02 18-8 Stainless Steel. Add To Cart Added! 18-8 Stainless Steel. You Might Also Like Phillips Tapping Screws - Oval Head, #10 x 2-1/2" $29.85 Phillips Tapping Screws - Oval Head, #12 x 2-1/2" $39.93 Phillips Tapping Screw - Pan Head, #8 x 3/8" $12.60 Stainless Countersunk Finishing Washer, #1/4 $21.92 Stainless Cotter Pin 3/32" x 3/4" $22.42