National Mfg N221-689 Hook Bolt 5/16x5 Inch Zinc 100LB

Product Description

The NATIONAL MFG/SPECTRUM BRANDS HHI N221-689 is a zinc-plated hook bolt designed for secure fastening applications where a threaded hook-end configuration is required. Measuring 5/16 inches in diameter and 5 inches in length, this fastener delivers a 100 LB load capacity suitable for light-to-medium duty anchoring tasks. The zinc finish provides basic corrosion resistance, making it appropriate for general indoor use and dry installations. Sold in a bulk pack of 10 units, it is a practical choice for contractors, maintenance technicians, and tradespeople who need reliable fasteners on hand for standard rough-in or fixture-mounting work.

This hook bolt is suited for residential and light commercial applications where a hook-end threaded fastener is needed to anchor equipment, conduit supports, pipe hangers, or utility hardware to structural framing or blocking. The 5/16-inch diameter shank accommodates standard nuts and washers of the same thread specification. The bulk pack quantity of 10 makes it practical for jobsite stocking or multi-point installation work where several fasteners are required at once.

Key Features

• 5/16 inch diameter x 5 inch length for versatile fastening reach
• 100 LB rated load capacity for light-to-medium duty applications
• Zinc finish provides basic corrosion resistance
• Hook-end configuration for loop anchoring and hanger support use
• Bulk pack of 10 units per package for jobsite convenience

Compatibility

Designed as a standard 5/16-inch hook bolt for use with matching nuts and washers in general construction, maintenance, and light-duty anchoring applications.

Installation Notes

Installation is typically performed by general contractors, electricians, plumbers, or maintenance technicians depending on the application. Ensure the substrate or structural member being fastened into is rated to support the intended load before installation. Power down any nearby electrical systems and shut off relevant utilities before working in the installation area. Follow applicable local building codes for fastener selection and load ratings.