Gibraltar GIB51535 Round U-bolt 1/2-13 Unc 2-1/2 Inch Pipe

Product Description

The GIBRALTAR GIB51535 is a round U-bolt designed for pipe support and restraint applications in mechanical, plumbing, and HVAC installations. Manufactured from C-1010 steel with a zinc-plated finish for corrosion resistance, this U-bolt fits 2-1/2 inch pipe and features a 1/2-13 UNC thread with a 3 inch thread length. The overall length measures 5-7/32 inches and the width is 2-15/16 inches. Four nuts are included. This fastener is installed without a mount plate, making it suitable for direct structural attachment. Plumbers, pipefitters, and mechanical contractors commonly use this type of U-bolt for pipe hangers and support brackets in both new construction and retrofit work.

The GIB51535 is suited for residential and commercial mechanical systems where 2-1/2 inch pipe requires secure, fixed support. Typical applications include water supply lines, HVAC refrigerant piping support, hydronic piping, and general mechanical piping runs. The zinc-plated finish provides adequate protection in dry and semi-exposed indoor environments. This U-bolt is used wherever a round-profile, threadrod-style pipe restraint is required on standard 2-1/2 inch nominal pipe.

Key Features

• Round profile fits 2-1/2 inch nominal pipe securely
• 1/2-13 UNC thread standard with 3 inch thread length for adequate fastening depth
• C-1010 steel construction for reliable tensile strength in pipe support duty
• Zinc-plated finish for corrosion resistance in indoor and semi-exposed applications
• Includes four nuts — no additional hardware required for basic installation
• No mount plate configuration for direct structural or strut-channel attachment

Compatibility

Designed as a standard replacement or new-installation U-bolt for 2-1/2 inch nominal pipe support applications in mechanical, plumbing, and HVAC piping systems.

Installation Notes

Installation is typically performed by licensed plumbers, pipefitters, or mechanical contractors. Ensure the supporting structure or strut channel is rated for the pipe load before torquing fasteners. Follow applicable IPC and IFGC guidelines for pipe support spacing and hardware requirements. Do not overtighten the nuts in a way that deforms the pipe wall, and verify the zinc-plated finish is appropriate for the environment before installing in wet or corrosive conditions.