Online Parts Store › Phillips Machine Screw - Oval Head, 1/4"-20 x 3-1/2" Image 1 of 1 Phillips Machine Screw - Oval Head, 1/4"-20 x 3-1/2" $50.70 18-8 Stainless Steel. Add To Cart Added! 18-8 Stainless Steel. You Might Also Like Stainless Countersunk Finishing Washer, #5/16 $22.42 Stainless Cotter Pin 5/32" x 1-1/2" $64.12 Phillips Tapping Screw - Pan Head, #10 x 1" $29.03 Nylon Flat Washer 1/4", 0.56" Thick, OD 11/16" $24.88 Phillips Tapping Screw - Pan Head, #12 x 2" $30.36