Online Parts Store › Phillips Machine Screw - Pan Head. 1/4"-20 x 1-1/2" Image 1 of 1 Phillips Machine Screw - Pan Head. 1/4"-20 x 1-1/2" $38.23 18-8 Stainless Steel. Add To Cart Added! 18-8 Stainless Steel. You Might Also Like Square Tapping Screw - Oval Head #8 x 3/4" $25.25 Flat Washer, 1/2", .078" Thick, OD 1-3/8" $74.51 Lock Washer, 7/16" $32.06 Stainless Fender Washer #8, .050" Thick, OD 3/4" $21.67 Lock Washer, M5 $10.83