National Marker N220830 Heavy-duty Screw Hook 3/8x4.5 in

Product Description

The NATIONAL MARKER N220830 is a heavy-duty screw hook designed for secure fastening and hanging applications in trade and industrial environments. Featuring a lag screw thread profile, this hook drives directly into wood framing, structural members, or similar substrates without a pre-drilled pilot hole in most softwood applications. Constructed from steel with a zinc finish, it resists corrosion in typical indoor and light-duty outdoor conditions. At 3/8 inches in diameter and 4-1/2 inches in length, it provides substantial holding capacity for suspending pipe, conduit, cable, equipment, or signage.

This screw hook is suited for residential and commercial construction, HVAC duct and pipe suspension, electrical conduit support, and general facility maintenance tasks. Its lag thread design makes it a practical choice for electricians, plumbers, HVAC technicians, and general contractors who need a reliable overhead or wall-mounted hanging point. The zinc finish adds a layer of protection appropriate for utility spaces, mechanical rooms, and similar environments.

Key Features

• Lag screw thread for direct drive into wood substrates
• Steel construction for reliable load-bearing performance
• Zinc finish for corrosion resistance in light-duty environments
• 3/8 inch diameter shank provides solid grip in framing members
• 4-1/2 inch length offers deep thread engagement for increased holding strength

Compatibility

Designed as a general-purpose lag screw hook suitable for wood framing, blocking, and structural lumber applications common in mechanical, electrical, and plumbing installations.

Installation Notes

Installation is typically performed by electricians, plumbers, HVAC technicians, or general contractors using a standard wrench or pliers on the hook shank. A pilot hole is recommended in hardwood or dense lumber to prevent splitting and ensure proper thread engagement. Always verify the substrate load rating before suspending equipment or pipe runs. Follow applicable building and mechanical codes for hanger spacing and support intervals.

Technical Specifications

• Diameter: 3/8 inches
• Length: 4-1/2 inches
• Material: Steel
• Finish: Zinc
• Thread Type: Lag screw
• Weight: 0.175 pounds
• Sold As: Each
• Minimum Order Quantity: 10

Standard Information

• Brand: NATIONAL MARKER
• Manufacturer Part Number: N220830