Online Parts Store › Phillips Machine Screw - Pan Head. 1/4"-20 x 3-1/2" Image 1 of 1 Phillips Machine Screw - Pan Head. 1/4"-20 x 3-1/2" $46.42 18-8 Stainless Steel. Add To Cart Added! 18-8 Stainless Steel. You Might Also Like Phillips Tapping Screws - Oval Head, #12 x 1" $45.16 Seachoice 01009 Lock Washer, 1/4" $13.60 Phillips Tapping Screw - Pan Head, #14 x 3/4" $49.38 Flat Washer, 5/16", .062" Thick, OD 7/8" $21.67 Carriage Bolt, 1/2"-13 x 4" $109.86