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 Phillips Tapping Screws - Flat Head, #14 x 2" $41.13 Flat Washer, #12, .050" Thick, OD 1/2" $15.75 Nylon Flat Washer 1/4", 0.56" Thick, OD 11/16" $24.88 Stainless Cotter Pin 1/8" x 1" $63.67 Phillips Tapping Screws - Oval Head, #10 x 3/4" $23.24