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 Phillips Tapping Screws - Flat Head, #6 x 1-1/2" $16.94 Phillips Tapping Screw - Pan Head, #8 x 1" $21.73 Stainless Fender Washer 5/8", .109" Thick, OD 2" $37.03 Phillips Tapping Screws - Flat Head, #8 x 5/8" $12.41 Flat Washer, 3/4", .109" Thick, OD 1-7/8" $47.99