Gibraltar 57180G Threaded Spring Plunger 3/8-16 Steel

Product Description

The GIBRALTAR 57180G is a threaded spring plunger designed for indexing, positioning, and locking applications in mechanical assemblies. It features a 3/8-16 thread size with a 1-1/8 inch thread length and a maximum plunger diameter of 0.186 inches. The plunger delivers 2.8 pounds of initial end force and 7.2 pounds of final end force, making it suitable for light-duty hold and release functions. The steel body and steel nose provide durability in demanding environments. A built-in locking element secures the plunger in the bore to prevent backing out under vibration. Machinists, maintenance technicians, and industrial assemblers install this type of hardware in fixtures, jigs, and mechanical positioning systems.

The 57180G is used in applications requiring repeatable positioning or detent action within machine tool fixtures, assembly jigs, production equipment, and general industrial machinery. The 3/16 inch projection provides positive engagement with mating detents or locating holes. The black finish offers basic corrosion resistance for dry or lightly oiled environments. This plunger suits both original equipment builds and maintenance replacement scenarios where a standard 3/8-16 threaded spring plunger is specified.

Key Features

• 3/8-16 thread size with 1-1/8 inch thread length for broad fixture compatibility
• 2.8 pounds initial end force and 7.2 pounds final end force for light-duty indexing
• 0.186 inch maximum plunger diameter with 3/16 inch projection
• Steel body and steel nose construction for durability
• Integrated locking element prevents backing out under vibration
• Black finish for basic corrosion resistance

Compatibility

Designed as a standard 3/8-16 threaded spring plunger suitable for use in mechanical fixtures, jigs, and positioning assemblies that accept this thread size and body configuration.

Installation Notes

Installation is performed by threading the plunger into a pre-tapped 3/8-16 hole using a 3/16 inch hex key. Ensure the mating bore is clean and free of debris before installation. The locking element should seat fully to prevent rotation during operation. De-energize or lock out any powered equipment before servicing assemblies that include this component.