Online Parts Store › Phillips Machine Screw - Pan Head. 5/16"-18 x 3" Image 1 of 1 Phillips Machine Screw - Pan Head. 5/16"-18 x 3" $28.28 18-8 Stainless Steel. Add To Cart Added! 18-8 Stainless Steel. You Might Also Like Stainless Cotter Pin $169.61 Stainless Fender Washer 1/4", .062" Thick ,OD 1" $39.24 Phillips Tapping Screw - Pan Head, #10 x 1-1/2" $36.40 Phillips Tapping Screws - Flat Head, #6 x 3/8" $9.01 Nylon Flat Washer 5/16", 0.62" Thick, OD 7/8" $37.54