Gibraltar GIB51130 Square U-bolt 3/8-16 Unc Stainless Steel 304

Product Description

The GIBRALTAR GIB51130 is a square stainless steel U-bolt designed for secure pipe, tube, and conduit clamping applications across plumbing, mechanical, and electrical installations. Formed from 304 stainless steel, this U-bolt resists corrosion in wet and outdoor environments where carbon steel hardware would degrade. The fastener uses a 3/8-16 UNC thread with a 3.75-inch thread length, providing ample engagement depth for standard hex nuts. At 4 inches wide and 7 inches in total length, it fits over square or rectangular stock and pipe runs of comparable outer dimensions. Each unit ships with two nuts and two washers, ready for immediate installation without additional hardware sourcing.

This U-bolt is suited for strut and hanger assemblies in residential and commercial mechanical rooms, rooftop equipment mounting, pipe support runs, and conduit securing in exposed or corrosive environments. The square profile distributes clamping load evenly across flat or squared objects rather than round pipe, making it appropriate for square tubing, framing members, or box conduit. Licensed plumbers, pipefitters, and electrical contractors working in humid or marine-adjacent environments often specify 304 stainless hardware to meet corrosion-resistance requirements on long-term installs.

Key Features

• 304 stainless steel construction resists rust and corrosion in wet or outdoor service
• Square shape provides even load distribution on square tubing and flat stock
• 3/8-16 UNC thread with 3.75-inch thread length ensures deep nut engagement
• 4-inch width accommodates square pipe, tubing, and conduit runs of comparable OD
• Includes two nuts and two washers for complete, hardware-ready installation
• No mount plate required, simplifying direct strut and hanger assembly

Compatibility

Designed as an OEM-style replacement or new-install fastener for square U-bolt applications requiring 3/8-16 UNC thread, 4-inch width, and 304 stainless steel construction in mechanical, plumbing, and electrical support systems.

Installation Notes

Installation is typically performed by licensed plumbers, pipefitters, or electricians following applicable mechanical or electrical codes. Shut off and secure any pressurized lines or energized conduit before installing or tightening clamp hardware. Use appropriate wrenches to snug nuts evenly on both threaded legs to avoid side-loading the U-bolt. Inspect the stainless threads for cross-threading before applying final torque, and use a flat washer under each nut to protect the mounting surface.