Online Parts Store › Phillips Machine Screw - Pan Head. 1/4"-20 x 5/8" Image 1 of 1 Phillips Machine Screw - Pan Head. 1/4"-20 x 5/8" $51.33 18-8 Stainless Steel. Add To Cart Added! 18-8 Stainless Steel. You Might Also Like Flat Washer, 3/4", .109" Thick, OD 1-7/8" $47.99 Flat Washer, 5/16", .062" Thick, OD 9/16" (A/N Style) $10.20 Nylon Insert Locknut - Stainless 3/4-10 $53.60 Phillips Tapping Screws - Flat Head, #4 x 1" $14.93 Stainless Cotter Pin $147.38