Online Parts Store › Phillips Machine Screw - Oval Head, 5/16"-18 x 2" Image 1 of 1 Phillips Machine Screw - Oval Head, 5/16"-18 x 2" $45.66 18-8 Stainless Steel. Add To Cart Added! 18-8 Stainless Steel. You Might Also Like Flat Washer, 1/4", .050" Thick, OD 11/16" $17.26 Square Tapping Screw - Oval Head #10 x 1-1/4" $57.05 Phillips Tapping Screw - Truss Head #10 x 3/4" $31.18 Nylon Insert Locknut - Stainless 10-32 $25.51 Flat Washer, 1/2", .078" Thick, OD 1-1/4" $38.42