Online Parts Store › Phillips Machine Screw - Pan Head. 1/4"-20 x 4" Image 1 of 1 Phillips Machine Screw - Pan Head. 1/4"-20 x 4" $58.13 18-8 Stainless Steel. Add To Cart Added! 18-8 Stainless Steel. You Might Also Like Phillips Tapping Screws - Flat Head, #8 x 5/8" $12.41 Seachoice 01533 Hex Nut, 1/2-13 $66.78 Stainless Fender Washer 5/16", .078" Thick, OD 1-1/2 $54.04 Blind Rivet, 1/8" x 3/8" $61.05 Flat Washer, 1/2", .078" Thick, OD 1-3/8" $74.51