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The NATIONAL MARKER N220897 is a steel screw hook with lag screw threads, designed for medium-weight to heavy-weight hanging applications. The hook measures 0.375 inches in diameter and 8 inches in length, offering a sturdy mounting solution for planters, signs, clotheslines, and similar suspended loads. Constructed from steel, it delivers reliable strength in both indoor and outdoor installations. This type of fastener is commonly installed by general contractors, maintenance technicians, and skilled tradespeople working in commercial or residential settings where a secure overhead or wall-mounted hook point is required.
This screw hook is suited for a wide range of hanging and suspension tasks in residential and light commercial environments. The lag screw thread design allows it to be driven directly into wood framing, joists, or solid wood substrate without a separate anchor in most applications. It is appropriate for use wherever a medium-duty to heavy-duty hook point is needed, including utility areas, garages, storage spaces, and outdoor structures such as pergolas or covered patios.
Designed as a direct-drive lag screw hook for use in solid wood framing, joists, and wood substrate applications typical of residential and light commercial construction.
Installation is performed by driving the lag screw threads directly into a wood substrate using a drill or screwdriver with the appropriate bit. Pre-drilling a pilot hole is recommended to prevent splitting the wood and to ease installation into denser lumber. Verify that the mounting substrate can support the intended load before hanging any items. Inspect the hook and mounting point periodically to confirm the fastener remains secure over time.
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