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 Nylon Insert Locknut - Stainless 10-32 $25.51 Nylon Flat Washer 3/8", 0.62" Thick, OD 1" $57.19 Square Tapping Screw - Oval Head #10 x 1-1/4" $57.05 Flat Washer, #12, .050" Thick, OD 1/2" $15.75 Flat Washer, #4, .032" Thick, OD 5/16" $6.74