Vlier SPRSN500P Pull Ring Plunger 1/2-13 Stainless Steel

Product Description

The VLIER SPRSN500P is a stainless steel pull ring plunger designed for precise positioning and indexing applications in industrial and mechanical assemblies. The unit features a 1/2-13 threaded body that installs into a tapped hole, with a spring-loaded plunger that extends 0.38 inches under working load. Initial end force starts at 1 pound and rises to a final end force of 4 pounds, making it suitable for light-duty detent and positioning tasks. The pull ring allows manual retraction of the plunger without tools, which is a common requirement in jigs, fixtures, and tooling setups. Maintenance technicians and mechanical assemblers are the typical installers.

This spring plunger fits applications where repeatable, low-force indexing is needed. Common uses include fixture plates, assembly jigs, machine tool slides, and any mechanism requiring a retractable locating point. The pull ring design is particularly useful in confined spaces or where gloved operation is required. The stainless steel construction makes it appropriate for environments with moisture exposure or mild corrosive conditions. It is sold individually with a minimum order quantity of 1.

Key Features

• Pull ring allows tool-free manual plunger retraction
• 1/2-13 thread for installation in standard tapped holes
• Spring force range: 1 pound initial to 4 pounds final end force
• Stainless steel construction for corrosion resistance
• Non-locking plunger type for smooth detent action
• Locking element included for thread retention after installation

Compatibility

Designed as a direct-install spring plunger for any application requiring a 1/2-13 tapped hole and a non-locking, pull-ring-style detent mechanism in industrial or mechanical assemblies.

Installation Notes

Install into a clean, properly tapped 1/2-13 hole using a wrench on the 0.5 inch hex head. Ensure the plunger bore in the mating component is sized to the 0.31 inch plunger diameter for correct engagement. Do not overtighten, as this can restrict plunger travel or damage the spring. The locking element secures the body in position once the correct depth is reached.