Online Parts Store › Phillips Machine Screw - Pan Head. 5/16"-18 x 3/4" Image 1 of 1 Phillips Machine Screw - Pan Head. 5/16"-18 x 3/4" $24.06 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 Phillips Tapping Screws - Flat Head, #4 x 3/4" $13.73 Phillips Tapping Screws - Oval Head, #10 x 3" $32.37 Nylon Insert Locknut - Stainless 7/16-14 $21.10 Stainless External Tooth Lock Washer 3/8" $34.20