Gibraltar 40309G Double Threaded Stud 1/4-20 5-1/2 in

Product Description

The GIBRALTAR 40309G is an equal double threaded stud with a 1/4-20 thread size and an overall length of 5-1/2 inches. Constructed from alloy steel with a black oxide finish, this stud is built for strength and corrosion resistance in demanding fastening applications. It carries a Grade 5 material rating and a Thread Fit Class 50, making it suitable for secure, precise thread engagement on both ends. Trades including HVAC, plumbing, and general mechanical service rely on double threaded studs to join two threaded components or to mount hardware where a bolt head would be impractical or inaccessible.

This stud is well suited for residential and commercial mechanical installations where a flush or recessed fastening solution is required. The equal thread configuration means both ends share the same 1/4-20 thread specification, simplifying parts inventory and reducing installation error. It is commonly used in equipment mounting, bracket attachment, and panel assembly across a range of trade service applications. The black oxide finish provides mild surface protection and reduces glare in finished assemblies.

Key Features

• Equal double threaded design with 1/4-20 threads on both ends for consistent engagement
• 5-1/2 inch overall length provides reach for deep mounting or standoff applications
• Alloy steel construction with Grade 5 material rating for high tensile strength
• Black oxide finish for mild corrosion resistance and clean appearance
• Thread Fit Class 50 ensures precise, reliable thread fit
• No flat on the stud body, maintaining a clean cylindrical profile

Compatibility

Designed as a standard 1/4-20 equal double threaded stud for general mechanical, HVAC, plumbing, and electrical trade applications requiring a Grade 5 alloy steel fastener.

Installation Notes

Installation is typically performed by a licensed tradesperson or qualified mechanic using a stud driver or two jam nuts threaded against each other to drive the stud into a tapped hole. Ensure the receiving threads are clean and free of debris before installation. Do not exceed the torque capacity appropriate for a Grade 5 1/4-20 alloy steel stud as specified by the equipment manufacturer. Always de-energize and isolate any system before performing fastener service on live mechanical or electrical assemblies.