Gibraltar 57080XG Threaded Spring Plunger 3/8-16 Steel

Product Description

The GIBRALTAR 57080XG is a threaded spring plunger designed for indexing, positioning, and light-duty locking applications in mechanical assemblies. The steel body and steel nose deliver consistent spring force across the plunger travel range, with an initial end force of 5.5 pounds and a final end force of 14.5 pounds. The 3/8-16 thread allows direct installation into tapped holes without additional hardware. At 1-1/8 inches in thread length and a maximum plunger diameter of 0.186 inches, this standard-length plunger fits a wide range of production and maintenance applications. Machinists, maintenance technicians, and fabricators commonly install this type of component in jigs, fixtures, and machine frames.

This spring plunger suits industrial and commercial mechanical assemblies where repeatable positioning or detent action is needed. Typical applications include machine tool fixtures, assembly jigs, die sets, and equipment panels requiring a non-locking retention point. The black finish provides basic corrosion resistance for indoor environments. The 3/16-inch plunger projection gives controlled travel depth appropriate for light-contact indexing. No locking element is present, so the plunger engages and releases freely under applied load.

Key Features

• 3/8-16 thread size for direct installation into standard tapped holes
• 1-1/8 inches thread length and body length for secure engagement depth
• 5.5 pound initial end force and 14.5 pound final end force for predictable detent resistance
• Steel body and steel nose for durability in industrial service
• 3/16-inch plunger projection with standard-length plunger type
• Black finish suitable for indoor mechanical environments

Compatibility

Designed as a standard 3/8-16 threaded spring plunger for use in tapped holes in metal fixtures, jigs, machine frames, and similar mechanical assemblies where non-locking spring retention is required.

Installation Notes

Installation is performed by threading the plunger body into a pre-tapped 3/8-16 hole using a 3/16-inch hex key. Ensure the mating hole is clean and free of debris before threading to avoid cross-threading the steel body. Torque to the assembly requirement of the host fixture using standard hand tools — do not overtighten, as this can bottom out the plunger and restrict spring travel. Secure the assembly area and de-energize any related equipment before servicing spring plungers in active machine assemblies.