Online Parts Store › Phillips Machine Screw - Oval Head, 1/4"-20 x 4" Image 1 of 1 Phillips Machine Screw - Oval Head, 1/4"-20 x 4" $55.86 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 Insert Locknut - Stainless 5/16-24 $46.35 Flat Washer, 5/16", .062" Thick, OD 9/16" (A/N Style) $10.20 Stainless Fender Washer #6, .050" Thick, OD 3/4" $19.71 Stainless Cotter Pin 1/8" x 1-1/4" $65.75