Gibraltar 40772G Unequal Double Threaded Stud 1/2-13 3in

Product Description

The GIBRALTAR 40772G is an unequal double threaded stud designed for bolted assemblies where two different thread engagement lengths are required at opposite ends. Manufactured from Grade 5 carbon steel with a black oxide finish, this stud measures 3 inches overall length with a 1/2-13 UNC thread form. The long thread end extends 1.5 inches and the short thread end extends 0.75 inches, providing flexibility in fastener engagement depth. Licensed trades and mechanical contractors use this stud in structural, mechanical, and equipment mounting applications where a fixed, non-removable intermediate fastener is specified.

This stud is suited for use in general industrial, HVAC equipment mounting, plumbing equipment supports, and mechanical assembly applications. The unequal thread configuration allows one end to be permanently set into a tapped hole while the other end accepts a nut for clamping. The black oxide finish provides mild corrosion resistance in indoor and sheltered environments. It is appropriate for both light commercial and residential trade installations requiring a Grade 5 strength fastener.

Key Features

• Unequal thread lengths: 1.5-inch long end and 0.75-inch short end for two-point engagement
• 1/2-13 UNC thread form for compatibility with standard inch-series nuts and tapped components
• Grade 5 carbon steel construction for reliable tensile strength in mechanical assemblies
• Black oxide finish for mild corrosion resistance and reduced light reflection
• Thread Fit Class 50 for controlled fit in precision tapped applications
• No flat (hex-free body) — torque applied through threaded engagement only

Compatibility

Designed as a standard 1/2-13 UNC unequal double threaded stud suitable for use with any standard 1/2-13 tapped holes and matching hex nuts in mechanical, HVAC, plumbing, and general equipment mounting assemblies.

Installation Notes

Installation is performed by mechanical or HVAC technicians using standard 1/2-13 compatible tooling. The long thread end is typically driven into a pre-tapped hole first; a thread-locking compound may be applied per the assembly specification. Because this stud has no flat, use a stud driver or double-nut method to install. Follow applicable mechanical codes and equipment manufacturer torque guidelines for the assembly being serviced.