L H Dottie Co LAG5166 Hex Head Lag Screw 5/16x6

Product Description

The L H Dottie Co LAG5166 is a hex head lag screw sized at 5/16 inch diameter by 6 inches in length. Lag screws of this type are heavy-duty wood fasteners used to anchor equipment, brackets, structural lumber, and mounting hardware in place. The hex head drive allows installation with a standard socket wrench or impact driver, making it well suited for field work where speed and torque are important. This fastener is a staple in HVAC, electrical, and plumbing rough-in work wherever equipment or racking must be secured to wood framing or blocking.

This lag screw is commonly used in residential and light commercial applications where a threaded wood fastener is required. Typical install scenarios include securing conduit straps, pipe hangers, equipment mounting feet, electrical enclosures, and support brackets to wood studs or structural lumber. The 6-inch length provides substantial thread engagement into thick framing members or stacked lumber assemblies.

Key Features

• 5/16 inch diameter hex head lag screw for high-torque wood fastening
• 6-inch length delivers deep thread engagement in structural lumber
• Hex head drive compatible with standard sockets and impact drivers
• Single-piece unit sold individually (each)
• Suitable for mounting HVAC, plumbing, and electrical support hardware to wood framing

Compatibility

Designed as a standard 5/16 inch hex head lag screw for use in wood framing, structural lumber, and blocking applications common to HVAC, plumbing, and electrical installations.

Installation Notes

Installation is typically performed by HVAC technicians, plumbers, or electricians during equipment mounting or rough-in phases. Always pre-drill a pilot hole of the appropriate diameter to prevent wood splitting, especially near the end grain of a framing member. Ensure the fastener is driven to the correct depth without overdriving, which can strip the wood fibers and reduce holding strength. Follow applicable building and mechanical codes for fastener spacing and load requirements.