Online Parts Store › Phillips Machine Screw - Flat Head, 1/4"-20 x 2-1/2" Image 1 of 1 Phillips Machine Screw - Flat Head, 1/4"-20 x 2-1/2" $25.89 18-8 Stainless Steel. Add To Cart Added! 18-8 Stainless Steel. You Might Also Like Phillips Tapping Screws - Oval Head, #10 x 3/4" $23.24 Phillips Tapping Screw - Pan Head, #14 x 1-1/2" $37.79 Stainless Fender Washer #10, .062" Thick, OD 1" $48.06 Phillips Tapping Screws - Flat Head, #4 x 3/4" $13.73 308 Piece Stainless Steel Fastener Display $6,664.43