Online Parts Store › Phillips Machine Screw - Pan Head. 5/16"-18 x 3" Image 1 of 1 Phillips Machine Screw - Pan Head. 5/16"-18 x 3" $28.28 18-8 Stainless Steel. Add To Cart Added! 18-8 Stainless Steel. You Might Also Like Phillips Tapping Screw - Truss Head #8 x 1-1/2" $63.30 Stainless Cotter Pin 3/32" x 1-1/4" $54.48 Seachoice 01008 Lock Washer, #12 $16.44 Phillips Tapping Screws - Oval Head, #10 x 5/8" $28.59 Phillips Tapping Screw - Pan Head, #10 x 3" $37.54