Vlier PR375P Locking Pull Ring Plunger 3/8-16 Steel

Product Description

The VLIER PR375P is a steel locking pull ring plunger designed for precise positioning and retention in industrial and mechanical assemblies. The unit features a 3/8-16 threaded body with a 1.2-inch thread length and a 0.233-inch plunger diameter. A spring-loaded mechanism delivers an initial end force of 2 pounds building to a final end force of 4 pounds, providing reliable hold in the extended position. The pull ring allows the operator to retract the plunger manually without tools, and the locking element holds the plunger in the retracted position until released. Maintenance technicians and assembly professionals install this component in fixtures, jigs, machine tools, and positioning equipment.

This plunger is suited for light-duty locking and indexing applications in both production and maintenance environments. Typical installations include tooling plates, work-holding fixtures, panel assemblies, and equipment frames where a quick-release retention point is needed. The threaded body installs directly into a tapped hole, making it straightforward to integrate into new builds or retrofit into existing assemblies. Steel construction supports use in demanding shop floor conditions where durability and consistent spring force are required.

Key Features

• Locking pull ring retracts and holds plunger out of engagement without tools
• Spring end force rated from 2 pounds initial to 4 pounds final for consistent retention
• 3/8-16 threaded body for standard tapped-hole installation
• Steel construction for durability in industrial and shop floor environments
• Compact 1.68-inch body length suitable for space-constrained assemblies
• 0.98-inch ring diameter for comfortable finger pull access

Compatibility

Designed as a direct threaded replacement or new-build component for any assembly accepting a 3/8-16 locking pull ring plunger with a 1.2-inch thread length and 0.233-inch plunger diameter.

Installation Notes

Installation requires a properly tapped 3/8-16 hole in the mating component. Verify hole depth accommodates the 1.2-inch thread length and that clearance exists for the 0.48-inch head height above the mounting surface. Power down or de-energize any equipment before installing or servicing plungers in live machinery. Do not overtighten the threaded body; follow standard torque guidance for 3/8-16 steel fasteners in the mating material.