Online Parts Store › Phillips Machine Screw - Pan Head. 1/4"-20 x 1/2" Image 1 of 1 Phillips Machine Screw - Pan Head. 1/4"-20 x 1/2" $38.86 18-8 Stainless Steel. Add To Cart Added! 18-8 Stainless Steel. You Might Also Like Phillips Tapping Screw - Pan Head, #14 x 1-1/2" $37.79 Socket Set Screw 1/4"-20 x 1/4" $26.96 Stainless Countersunk Finishing Washer, #12 $18.89 Phillips Tapping Screw - Pan Head, #14 x 3/4" $49.38 Phillips Tapping Screws - Flat Head, #8 x 1-1/4" $19.34