Gibraltar GIB53653 Round U-bolt 5/16-18 Unc 1-1/4 Inch Pipe

Product Description

The GIBRALTAR GIB53653 is a round U-bolt with a mount plate designed to secure pipe to a structural surface in mechanical, plumbing, and HVAC piping systems. Formed from C-1010 steel with a hot galvanized finish, this fastener resists corrosion in both indoor and outdoor installations. It features a 5/16-18 UNC thread with a 1-1/8 inch thread length, fits 1-1/4 inch pipe, and ships with two nuts included. At 0.18 pounds, it is a compact, single-piece fastener suited for trade installers who need a reliable, code-appropriate pipe support in conduit, plumbing, or mechanical piping runs.

This U-bolt is designed for use in residential and light commercial applications where 1-1/4 inch pipe must be anchored to a wall, beam, or strut channel. The included mount plate provides a stable bearing surface and simplifies installation on flat substrates. Plumbers, pipefitters, HVAC mechanics, and general mechanical contractors will encounter this type of fastener in domestic water supply lines, gas distribution piping, refrigerant line sets, and similar pipe support situations. The hot galvanized coating makes it suitable for damp or outdoor-exposed locations.

Key Features

• Round profile fits 1-1/4 inch pipe for a secure, centered clamp
• 5/16-18 UNC thread with 1-1/8 inch thread length for positive nut engagement
• Includes two nuts — no additional hardware required for basic installation
• C-1010 steel construction with hot galvanized finish for corrosion resistance
• Mount plate included for direct attachment to flat structural surfaces
• Inch measurement system; width across the U is 1-3/4 inches, overall length is 2-11/16 inches

Compatibility

Designed as a standard pipe support fastener for 1-1/4 inch nominal pipe in plumbing, HVAC, and mechanical piping systems.

Installation Notes

Installation is typically performed by a licensed plumber, pipefitter, or HVAC mechanic in accordance with IPC or IFGC pipe support spacing requirements. De-pressurize and isolate the pipe run before positioning the U-bolt. Tighten the two included nuts evenly to avoid cocking the mount plate against the support surface. Do not over-torque on galvanized threads; snug and firm is sufficient for standard pipe support duty.