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The NATIONAL HARDWARE N221-317 is a zinc-plated steel eye bolt measuring 1/2 inch in diameter by 6 inches in length. It features machine screw threads and ships with a hex nut assembled, giving installers a ready-to-use fastener straight out of the package. The eye loop provides a reliable anchor point for hooks, cables, chains, rope, or wire rope hardware. Licensed trades and general contractors reach for this fastener when a strong, threaded anchor is needed in wood, metal, or structural framing members. The zinc plating provides corrosion resistance suited to both interior and exterior service environments.
This eye bolt fits a wide range of home and industrial applications where a looped anchor point is required. Common uses include suspension rigging for light fixtures, cable routing, tie-down anchor points, and equipment hanging in residential, commercial, and light industrial settings. Its machine thread design requires a pre-drilled and tapped hole or a matching threaded insert for proper installation. The assembled hex nut allows for secure flush mounting against the mounting surface.
Designed as a general-purpose threaded eye bolt for use in residential and light industrial fastening applications where a 1/2 inch machine-thread anchor point is required.
Installation is typically performed by general contractors, electricians, or rigging technicians depending on the application. Always pre-drill and tap the receiving material to match the machine thread specification before installing. Do not exceed the load rating of the mounting substrate, and ensure the hex nut is tightened flush against the surface for secure retention. Verify that all suspension or rigging applications comply with applicable local building codes and load requirements.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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