Gibraltar GIB53671 Round U-bolt 2-1/2 Inch Pipe Galvanized

Product Description

The GIBRALTAR GIB53671 is a round U-bolt with a mount plate designed to secure 2-1/2 inch pipe in mechanical, plumbing, and HVAC piping systems. Manufactured from C1010 steel with a hot-dipped galvanized finish, it delivers corrosion resistance suited to indoor and outdoor installations. The 5/16-18 UNC thread runs 1 inch in length, and the overall bolt length is 3-11/16 inches with a 3 inch width. Two nuts are included. This hardware is installed by plumbers, HVAC technicians, pipefitters, and mechanical contractors where pipe support and restraint are required.

The GIB53671 is used in residential and light commercial applications where 2-1/2 inch pipe must be fastened to a structural surface such as a joist, beam, or strut. The integrated mount plate eliminates the need for a separate backing plate, making it a straightforward choice for new construction and retrofit pipe support work. Typical uses include securing copper, steel, or plastic piping runs in mechanical rooms, utility spaces, and equipment rooms.

Key Features

• Round U-bolt profile designed specifically for 2-1/2 inch pipe outside diameter
• Hot-dipped galvanized finish on C1010 steel for corrosion resistance in damp and outdoor environments
• Integrated mount plate simplifies installation and eliminates loose backing hardware
• 5/16-18 UNC threading with 1 inch thread length for secure nut engagement
• Includes two nuts — no additional fasteners required for standard installation
• Overall bolt length of 3-11/16 inches with 3 inch width

Compatibility

Designed for use with 2-1/2 inch nominal pipe in standard pipe support applications. Verify pipe outside diameter before installation to confirm proper fit.

Installation Notes

Installation is performed by licensed plumbers, pipefitters, or HVAC mechanics. Confirm the mounting surface can support the pipe load before fastening. Tighten nuts evenly to draw the mount plate flush against the surface without over-compressing the pipe. Follow applicable IPC and IFGC pipe support spacing requirements for the pipe material and service being installed.