National Mfg N222-117 Zinc U-bolt 1/4x1-3/8x4 in 146

Product Description

The NATIONAL MFG/SPECTRUM BRANDS HHI N222-117 is a 146-grade zinc-plated U-bolt designed for clamping, securing, and mounting applications common in plumbing, mechanical, and general trade work. Measuring 1/4 inch in diameter by 1-3/8 inches in width by 4 inches in length, this U-bolt delivers corrosion resistance through its zinc plating, making it suitable for both indoor and light-duty outdoor installations. Sold in bulk packs of 5 units, it suits contractors and technicians who need reliable fasteners on hand for service calls and installations.

This U-bolt is used wherever pipe, conduit, tubing, or structural members need to be clamped or secured to a flat surface or support. Typical applications include pipe hangers, conduit straps, tube clamps, and light structural mounting in residential and commercial mechanical systems. The 4-inch leg length accommodates a range of pipe diameters and mounting depths, while the 1-3/8-inch inner width targets standard small-diameter pipe and tubing. Electricians, plumbers, HVAC technicians, and general contractors commonly use this fastener type during rough-in and finish work.

Key Features

• 146-grade zinc plating provides corrosion resistance for indoor and light-duty outdoor use
• 1/4-inch diameter threaded rod legs for standard nut and washer hardware compatibility
• 4-inch leg length accommodates a range of pipe sizes and mounting configurations
• 1-3/8-inch inner width suited for small-diameter pipe and tubing clamping
• Bulk pack of 5 units per package reduces per-unit cost for service and installation work

Compatibility

Designed as a general-purpose zinc U-bolt for pipe, conduit, and tube clamping applications in residential and commercial mechanical installations. No specific OEM or model compatibility was listed in the product data.

Installation Notes

Installation is performed by plumbers, electricians, or HVAC technicians depending on the application. Power down or shut off the relevant system before securing conduit, pipe, or tubing runs. Use appropriately rated nuts and washers with 1/4-inch thread, and follow applicable code requirements under the NEC, IPC, or IFGC for fastener spacing and support intervals. Do not overtighten, as this can deform the pipe or tubing being clamped.