Online Parts Store › Phillips Machine Screw - Pan Head. 1/4"-20 x 5/8" Image 1 of 1 Phillips Machine Screw - Pan Head. 1/4"-20 x 5/8" $51.33 18-8 Stainless Steel. Add To Cart Added! 18-8 Stainless Steel. You Might Also Like Phillips Tapping Screw - Pan Head, #12 x 3/4" $37.60 Stainless External Tooth Lock Washer 3/8" $34.20 Phillips Tapping Screws - Flat Head, #6 x 1/2" $9.26 Phillips Tapping Screw - Truss Head #8 x 3/4" $17.19 Flat Washer, #6, .032" Thick, OD 3/8" $8.19