National Mfg N221-697 Hook Bolt 3/8x7 Zinc 135 Lb 10 Pack

Product Description

The NATIONAL MFG/SPECTRUM BRANDS HHI N221-697 is a zinc-plated hook bolt designed for secure fastening applications in residential and light commercial settings. Measuring 0.375 inches in diameter and 7 inches in length, this hook bolt delivers a 135 lb load capacity, making it suitable for hanging, anchoring, or securing loads to structural members. The zinc plating provides corrosion resistance for both interior and general-purpose exterior use. Sold in a bulk pack of 10 units, this part is well suited for contractors, maintenance technicians, and tradespeople who need reliable fasteners in quantity.

This hook bolt is used in a range of trade applications including securing conduit hangers, plumbing supports, HVAC duct hangers, and general-purpose load-bearing fastening tasks. The 0.375-inch diameter shaft and 7-inch length make it compatible with standard framing lumber and typical anchor installations. The bulk pack format supports job-site efficiency for installers working on multiple attachment points in a single project.

Key Features

• 135 lb rated load capacity for reliable load-bearing fastening
• 0.375 inches x 7 inches dimensions suit standard framing and structural applications
• Zinc plating provides corrosion resistance for interior and light exterior use
• Bulk pack of 10 units reduces per-unit cost for multi-point installations
• Hook end design allows quick attachment of hangers, straps, or support hardware

Compatibility

Designed as a general-purpose 0.375-inch hook bolt suitable for standard wood framing, structural lumber, and typical trade fastening applications where a 7-inch hook bolt with 135 lb load capacity is specified.

Installation Notes

Install by threading or driving the bolt into the appropriate substrate, ensuring the material can support the rated 135 lb load. A correctly sized pilot hole in wood framing will reduce splitting risk and improve seating. Follow applicable building codes and manufacturer load ratings when using in overhead or suspended applications. Verify that all hanging or anchoring hardware attached to the hook end is rated at or above the intended load.