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 Flat Washer, #8, .032" Thick, OD 3/8" $5.42 Phillips Tapping Screws - Flat Head, #8 x 1/2" $12.41 Socket Set Screw 10-24 x 1/4" $22.63 Tee Nut - Stainless 10-24 $37.98 Phillips Tapping Screws - Flat Head, #6 x 3/4" $10.33