Gibraltar PR50-G Pull Ring Plunger 1/2-13 Steel

Product Description

The GIBRALTAR PR50-G is a steel, non-locking pull ring plunger designed for indexing, positioning, and locating applications in mechanical assemblies. It features a 1/2-13 thread size with a thread length of 0.43 inches and a plunger diameter of 0.31 inches. The spring-loaded plunger delivers an initial end force of 1 pound and a final end force of 4 pounds, making it suitable for light-duty retention tasks. The pull ring allows the plunger to be retracted manually without additional tooling. Installed by machinists, maintenance technicians, and mechanical assemblers, this plunger is a standard hardware component in jigs, fixtures, and equipment panels.

The PR50-G is used in industrial and commercial mechanical assemblies where a repeatable, spring-loaded detent or stop point is needed. It threads directly into tapped holes and is pulled to disengage, then spring-returns to the locked detent position. Typical applications include fixture plates, machine guarding panels, equipment enclosures, and tooling setups where quick manual disengagement is required without tools.

Key Features

• Non-locking pull ring design allows manual plunger retraction without tooling
• 1/2-13 thread size with 0.43-inch thread length for standard tapped-hole installation
• Spring force range: 1 pound initial to 4 pounds final end force
• Plunger diameter of 0.31 inches and plunger projection of 0.38 inches
• Steel construction for durability in industrial environments
• Compact body length of 0.81 inches suits space-constrained assemblies

Compatibility

Designed as a direct-thread replacement or new-installation pull ring plunger for mechanical assemblies with a 1/2-13 tapped hole and clearance for a 1-inch ring diameter.

Installation Notes

Installation is performed by threading the PR50-G into a 1/2-13 tapped hole using a wrench on the 0.5-inch hex head. De-energize or lock out any equipment before installing or replacing plungers in active machinery per applicable OSHA lockout/tagout procedures. Do not exceed the rated end force by forcing the plunger beyond its designed projection range. Verify thread engagement depth against the 0.43-inch thread length to ensure secure seating in the mating component.