Gibraltar 840535F-G Steel T-strap Bolt 1/2-20 Zinc-plated

Product Description

The GIBRALTAR 840535F-G is a Grade 5 steel T-strap bolt designed for structural fastening applications where a wide, flat head is required to distribute clamping load across a surface. The bolt features a 1/2-20 UNF thread form, a 2-1/2 inch thread length, and a 3-1/2 inch length under the head. A zinc-plated finish provides baseline corrosion resistance for general indoor and sheltered outdoor installations. The wide 2-inch head width and 1/2-inch head height make this fastener well-suited for strap, bracket, and flat-plate connections in mechanical, HVAC, and light structural assemblies.

T-strap bolts of this pattern are commonly used in HVAC equipment mounting, equipment base-rail attachment, ductwork support strapping, and general mechanical assembly where a broad bearing surface is needed under the bolt head. The 1/2-20 UNF thread is a fine-pitch specification, which provides good resistance to loosening under vibration. Licensed HVAC technicians, mechanical contractors, and maintenance professionals typically install this fastener type during unit installation, equipment anchoring, or structural strap fabrication.

Key Features

• Grade 5 steel construction for reliable tensile and shear strength in mechanical fastening
• 1/2-20 UNF fine-pitch thread resists loosening in vibration-prone equipment installations
• 2-inch head width distributes clamping load across straps, brackets, and flat-plate surfaces
• Zinc-plated finish provides corrosion resistance for sheltered and indoor service environments
• 3-1/2 inch length under head accommodates moderate material stack-ups in typical assembly applications

Compatibility

Designed as an OEM-style replacement or service fastener for applications requiring a 1/2-20 UNF T-strap bolt with a 2-inch wide head in steel construction.

Installation Notes

Install using standard 1/2-inch drive hand or impact tools appropriate for Grade 5 fasteners. Ensure mating threads are clean and free of debris before installation. Power down or de-energize any equipment before performing fastener work on live mechanical assemblies. Do not exceed the rated torque range for Grade 5 fasteners of this thread size as published in applicable mechanical or HVAC equipment service documentation.