Gibraltar 40878G Double Threaded Stud 5/8-11 5in Stainless

Product Description

The GIBRALTAR 40878G is an unequal double threaded stud with a 5/8-11 thread size and an overall length of 5 inches. Made from 303-grade stainless steel with a black oxide finish, this stud provides corrosion resistance and reliable fastening performance in demanding mechanical and industrial applications. Both the long and short thread lengths measure 1-3/4 inches, and the stud carries a Thread Fit Class 50 rating for controlled thread engagement. No flat is machined onto the body. Tradespeople and maintenance technicians use this stud where a permanent or semi-permanent threaded connection is needed between two components without a conventional bolt head.

This stud is suited for general mechanical assembly, HVAC equipment mounting, pump and motor mounting, plumbing fixture installation, and structural fastening tasks that require a stainless steel fastener with a black oxide surface treatment. The 5/8-11 coarse thread pitch is a common standard size across residential and light commercial equipment, making this stud a practical stock item for service vans and shop inventory. Installation requires standard wrenches or stud-driver sockets compatible with 5/8-11 thread engagement.

Key Features

• 303 stainless steel construction for corrosion resistance in wet or chemical environments
• Black oxide finish reduces light reflection and provides mild additional surface protection
• 5/8-11 coarse thread on both ends for broad compatibility with standard nuts and tapped holes
• Equal long and short thread lengths of 1-3/4 inches allow flexible installation orientation
• Thread Fit Class 50 for consistent, controlled thread engagement
• No flat on shank — install and remove using a stud-driver or double-nut method

Compatibility

Designed as a standard 5/8-11 unequal double threaded stud for use in mechanical assemblies, equipment mounting, and structural fastening applications where a 5/8-11 coarse thread stud is specified.

Installation Notes

Installation and removal of this stud require a stud-driver tool or the double-nut method, as no flat is present on the shank. De-energize and lock out all electrical and mechanical equipment before replacing fasteners on live systems. Follow applicable mechanical codes and the equipment manufacturer torque specifications for the assembly being serviced. Inspect mating threads in the tapped hole or nut for damage before installation to ensure proper Thread Fit Class 50 engagement.