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 Flat Washer, 7/16", .062" Thick, OD 1-1/8" $27.80 Square Tapping Screw - Oval Head #8 x 3/4" $25.25 Phillips Tapping Screws - Oval Head, #12 x 2" $30.67 Phillips Tapping Screws - Flat Head, #6 x 1/2" $9.26 Stainless External Tooth Lock Washer 3/8" $34.20