National Marker N220871 Steel Screw Hook

Product Description

The NATIONAL MARKER N220871 is a steel screw hook designed for medium-weight to heavy-weight hanging applications. It measures 5/16 inch in diameter and 4-1/2 inches in length, with lag screw threads that drive directly into wood substrates for a secure hold. This type of hardware is commonly installed by contractors, maintenance technicians, and experienced DIYers wherever a reliable overhead or wall-mounted hook point is needed. The all-steel construction provides solid load-bearing performance in both indoor and light outdoor environments.

This screw hook is suited for hanging planters, signs, clotheslines, bird feeders, and similar suspended loads in residential and light commercial settings. The lag screw thread design allows installation directly into wood framing, joists, beams, or posts without requiring a separate anchor. It is sold individually and fits standard hand-tool installation workflows.

Key Features

• Lag screw threads for direct wood installation without a separate anchor
• 5/16 inch diameter shank for medium-weight to heavy-weight hanging capacity
• 4-1/2 inch length provides deep thread engagement in wood substrate
• All-steel construction for durable load support
• Suitable for planters, signs, clotheslines, and similar suspended applications

Compatibility

Designed as a general-purpose screw hook for installation into wood substrates in residential and light commercial hanging applications.

Installation Notes

Installation is typically performed with a hand tool or drill driver fitted to the hook shank. Pre-drilling a pilot hole slightly smaller than the shank diameter is recommended to prevent wood splitting, especially in hardwood or near board edges. Ensure the host material provides sufficient thread engagement depth to support the intended load. Inspect the installation point for structural integrity before applying load.

Technical Specifications

• Diameter: 5/16 inches
• Length: 4-1/2 inches
• Material: Steel
• Thread Type: Lag screw
• Weight: 0.131 pounds
• UPC: 00038613123052

Standard Information

• Brand: NATIONAL MARKER
• Manufacturer Part Number: N220871