5/16-12X4 Unslotted Hex Washer With Number 5 Point Full Thread Self Drill Screw Zinc (Pack Qty 300) BC-3164KW5

Designed to drill through a greater thickness of steel than a standard self drilling screw. Although it can assist in attaching metal deck to structural steel, the #4 & #5 point self drilling screws are not structural bolts and should not be used as such AISI 1022 or equivalent steel Screws shall be quenched in liquid and then tempered by reheating to 625°F minimumYou may also like 3/8-24X1 3/4 Fine Thread Socket Head Cap Screw Black DFAR (Pack Qty 100) BC-3828CSP.