Online Parts Store › Phillips Machine Screw - Flat Head, 8-32 x 1/2" Image 1 of 1 Phillips Machine Screw - Flat Head, 8-32 x 1/2" $13.92 18-8 Stainless Steel. Add To Cart Added! 18-8 Stainless Steel. You Might Also Like Phillips Tapping Screw - Pan Head, #12 x 1-1/4" $23.49 Flat Washer, 5/16", .062" Thick, OD 7/8" $52.44 Seachoice 01013 Lock Washer, 3/8" $58.45 Flat Washer, 5/16", .062" Thick, OD 9/16" (A/N Style) $10.20 Phillips Tapping Screws - Oval Head, #12 x 1-1/2" $30.55