Gibraltar GIB51520 Round U-bolt 3/8-16 Unc 1-1/4 in Pipe

Product Description

The GIBRALTAR GIB51520 is a round U-bolt designed to secure pipe, conduit, and similar round stock to structural supports. Built from C-1010 steel with a zinc-plated finish, it resists corrosion in typical mechanical and plumbing service environments. The 3/8-16 UNC thread runs 2-3/8 inches in length, providing adequate engagement for standard hex nuts. Four nuts are included. The inside width of 1-11/16 inches accommodates 1-1/4 inch nominal pipe. Overall length measures 3-23/32 inches. This fastener is installed without a mount plate, making it suitable for applications where a bare U-bolt profile is required. Plumbers, pipefitters, and mechanical contractors commonly install this hardware.

The GIB51520 is used in residential and light commercial mechanical systems to support pipe runs at hanger intervals. Typical applications include anchoring 1-1/4 inch nominal pipe to strut channel, beam flanges, or structural members. It is appropriate for plumbing supply lines, low-pressure gas piping supports, HVAC refrigerant line hangers, and general mechanical pipe support layouts where a round-bend U-bolt is specified. The zinc-plated steel construction suits dry and mildly humid indoor environments.

Key Features

• Round bend profile fits 1-1/4 inch nominal pipe with 1-11/16 inch inside width
• 3/8-16 UNC thread with 2-3/8 inch thread length for secure nut engagement
• C-1010 steel construction provides reliable tensile strength for pipe support loads
• Zinc-plated finish adds corrosion resistance in standard indoor mechanical environments
• Includes four nuts — no additional hardware required for basic installation
• No mount plate design for direct strut or structural attachment

Compatibility

Designed as an OEM-style replacement and standard hardware fit for 1-1/4 inch nominal pipe support applications in plumbing, HVAC, and mechanical systems.

Installation Notes

Installation should be performed by a licensed plumber, pipefitter, or qualified mechanical contractor in accordance with applicable IPC and IFGC support spacing requirements. Shut off and depressurize the pipe system before repositioning or replacing existing pipe supports. Use the appropriate wrench size for 3/8-16 nuts and tighten evenly on both legs to avoid cocking the U-bolt on the pipe. Do not overtighten against plastic or soft-wall tubing without appropriate pipe protection sleeves.