Gibraltar GIB53665 Round U-bolt 5/16-18 Unc 2 Inch Pipe

Product Description

The GIBRALTAR GIB53665 is a round U-bolt with a mount plate, designed to secure 2-inch pipe in mechanical, plumbing, and HVAC support applications. Manufactured from C-1010 steel with a hot galvanized finish, it delivers corrosion resistance suited for both indoor and outdoor installations. The U-bolt features 5/16-18 UNC threads with a 1-inch thread length and an overall length of 3.19 inches, providing a reliable clamping grip on pipe runs. Two nuts are included for immediate installation without additional hardware. Plumbers, pipefitters, and HVAC technicians use this type of fastener to anchor pipe to structural supports, unistrut, or mounting surfaces.

This U-bolt is sized for 2-inch nominal pipe and fits standard pipe support and hanging applications in residential and light commercial mechanical systems. The integrated mount plate simplifies attachment to flat surfaces, beam flanges, or support channels. It is well suited for use in HVAC refrigerant line support, domestic water piping, and general mechanical pipe runs where a secure, low-profile mount is required. The hot galvanized coating makes it appropriate for use in damp or humid environments such as mechanical rooms, crawlspaces, and outdoor exposed pipe runs.

Key Features

• Round U-bolt profile designed for 2-inch nominal pipe
• 5/16-18 UNC thread with 1-inch thread length for positive nut engagement
• C-1010 steel construction with hot galvanized finish for corrosion resistance
• Includes two nuts — no additional hardware required for installation
• Integrated mount plate for direct attachment to flat surfaces or structural supports
• Overall length of 3.19 inches for a compact, secure fit

Compatibility

Designed for use with 2-inch nominal pipe in standard mechanical, plumbing, and HVAC pipe support applications. The 5/16-18 UNC thread pattern is compatible with standard hex nuts and washers commonly used in pipe support assemblies.

Installation Notes

Installation is typically performed by licensed plumbers, pipefitters, or HVAC technicians as part of a pipe support system. Shut off system pressure and confirm the pipe is properly supported before tightening fasteners. Thread engagement should be verified to ensure both nuts seat fully against the mount plate. Comply with applicable local mechanical codes and manufacturer spacing recommendations for pipe support intervals.