Online Parts Store › Phillips Machine Screw - Oval Head, 1/4"-20 x 2-1/2" Image 1 of 1 Phillips Machine Screw - Oval Head, 1/4"-20 x 2-1/2" $28.66 18-8 Stainless Steel. Add To Cart Added! 18-8 Stainless Steel. You Might Also Like Phillips Tapping Screws - Flat Head, #6 x 3/4" $10.33 Stainless Fender Washer #8, .050" Thick, OD 3/4" $21.67 Phillips Self Drilling Screw - Pan Head #10 x 3/4" $36.40 Nylon Flat Washer 5/16", 0.62" Thick, OD 7/8" $37.54 Phillips Self Drilling Screw - Pan Head #10 x 1-1/4" $37.54