Gibraltar GIB53683 Round U-bolt 3/8-16 Unc 1-1/4 Inch Pipe

Product Description

The GIBRALTAR GIB53683 is a round U-bolt with a mount plate, designed to secure 1-1/4 inch pipe in plumbing, HVAC, and mechanical piping applications. Constructed from C-1010 steel with a hot galvanized finish, it resists corrosion in exposed or damp environments. The fastener uses a 3/8-16 UNC thread with a 1-1/8 inch thread length and measures 2-3/4 inches in length and 1-3/4 inches in width. Two nuts are included. Plumbers, pipefitters, and mechanical contractors use this type of hardware to support pipe runs along walls, ceilings, and structural members in both new construction and retrofit work.

This U-bolt is suited for residential and light commercial pipe support applications involving 1-1/4 inch nominal pipe. The integrated mount plate simplifies attachment to flat surfaces such as framing lumber, concrete inserts, or structural steel. The hot galvanized finish makes it appropriate for wet areas, mechanical rooms, and outdoor-adjacent installations where bare steel hardware would corrode prematurely. It arrives ready to install with two matching nuts included.

Key Features

• Round U-bolt profile fits 1-1/4 inch nominal pipe
• 3/8-16 UNC thread with 1-1/8 inch thread length for positive nut engagement
• Integrated mount plate for direct attachment to flat surfaces
• C-1010 steel construction with hot galvanized corrosion-resistant finish
• Includes two nuts — no additional hardware required for standard installation
• 2-3/4 inch overall length and 1-3/4 inch width

Compatibility

Designed for use with 1-1/4 inch nominal pipe in standard pipe support and restraint applications across plumbing, HVAC, and mechanical piping systems.

Installation Notes

Installation is typically performed by licensed plumbers or pipefitters. Verify that the mounting surface and fastener hardware meet local code requirements, including applicable IPC and IFGC provisions for pipe support spacing and material compatibility. Ensure the pipe run is properly supported before tightening hardware to avoid stress concentrations. Hand-tighten nuts evenly on both legs of the U-bolt before applying final torque to maintain even seating against the mount plate.