Gibraltar GIB51030 Square U-bolt 3/8-16 Unc Steel

Product Description

The GIBRALTAR GIB51030 is a square U-bolt designed for pipe, conduit, and structural clamping applications in mechanical, plumbing, and electrical installations. Manufactured from C-1010 steel with a zinc-plated finish, this fastener resists corrosion in typical indoor and light-duty outdoor environments. The 3/8-16 UNC thread pattern provides a strong, reliable connection, and the 3-3/4 inch thread length accommodates standard hardware and locking configurations. Each unit ships with two nuts and two washers, making it a ready-to-install fastener assembly. At 0.5 pounds, it is sized for practical single-hand positioning during install. No mount plate is included or required for this configuration.

This square U-bolt is suited for securing round pipe, conduit runs, or tubing to flat structural surfaces such as unistrut channel, wooden framing members, or steel angle iron. Common applications include HVAC ductwork support, plumbing pipe hangers, conduit strapping, and general mechanical equipment anchoring in both residential and light commercial settings. The square profile provides consistent clamping pressure across the pipe diameter and minimizes rotation under load. Installers working in pipe-strapping applications will find the included hardware eliminates a separate trip to the fastener bin.

Key Features

• Square profile body provides even clamping pressure and prevents rotation during torque-down
• 3/8-16 UNC threading for compatibility with standard SAE nuts and hardware
• 3-3/4 inch thread length accommodates a range of pipe diameters and mounting thicknesses
• C-1010 steel construction with zinc-plated finish for corrosion resistance in typical service environments
• 4 inch interior width suits common pipe and conduit diameters
• Includes two nuts and two washers — no additional fastener hardware required

Compatibility

Designed as a standard-dimension square U-bolt for use with round pipe, conduit, or tubing in general mechanical, plumbing, and electrical fastening applications where a 3/8-16 UNC thread and 4 inch interior width are specified.

Installation Notes

Installation is typically performed by plumbers, pipefitters, electricians, or mechanical contractors using standard hand tools. Shut off fluid flow or de-energize the conduit run before repositioning or replacing pipe supports. Verify that the mounting surface can bear the load of the supported pipe, conduit, or equipment before tightening. Follow applicable codes such as the IPC, IFGC, or NEC for required pipe-support spacing and fastener specifications.