Uxcell M8 x 40mm 304 Stainless Steel Hex Lag Screws for Wood 10 Pack

Uxcell M8 x 40mm 304 Stainless Steel Half Thread Self-Tapping Bolts Hex Lag Screws for Wood Screw 10 Pack Lag screws or coach screws are large wood screws. The head is typically an external hex. with the coarse threads of a wood-screw or sheet-metal-screw thread form (but larger). Lag screws are used to lag together lumber framing to lag machinery feet to wood floors and other carpentry applications.