Gibraltar PR58-G Steel Pull Ring Plunger 5/8-11

Product Description

The GIBRALTAR PR58-G is a steel pull ring plunger designed for indexing, locating, and positioning applications in industrial and mechanical assemblies. The plunger features a non-locking mechanism with a pull ring for manual retraction, allowing operators to disengage the plunger without additional tools. It threads into a tapped 5/8-11 hole and delivers an initial end force of 1.25 pounds ramping to a final end force of 5 pounds. The plunger diameter measures 0.38 inches with a projection of 0.44 inches, making it well-suited for light-duty detent and alignment tasks. Machinists, maintenance technicians, and assembly line installers are the primary users.

This pull ring plunger is used in jigs, fixtures, machine tool components, and general industrial equipment where a spring-loaded locating point is required. The pull ring design is preferred in applications where the plunger must be retracted frequently or where gloved operation makes tool-free actuation necessary. It is appropriate for both new builds and replacement of worn or damaged plungers in existing threaded housings sized for 5/8-11 thread.

Key Features

• Non-locking pull ring design allows manual retraction without tools
• Steel construction for durability in industrial environments
• 5/8-11 thread size for standard tapped-hole installation
• Spring force range: 1.25 pounds initial to 5 pounds final end force
• Plunger diameter of 0.38 inches with 0.44 inches of projection
• Hex size of 0.62 inches for wrench-assisted installation and removal

Compatibility

Designed as a standard replacement or new-installation pull ring plunger for threaded housings with a 5/8-11 tapped hole requiring a non-locking steel plunger with a 0.38-inch plunger diameter.

Installation Notes

Installation is performed by threading the plunger body into a pre-tapped 5/8-11 hole using a wrench applied to the 0.62-inch hex. Ensure the mating bore or detent hole is clean and free of debris before seating the plunger. Do not overtighten, as this can compress the spring or damage the thread. Verify plunger projection and force requirements match the application before finalizing installation.