Vlier SPRSN250 Pull Ring Plunger 1/4-20 Stainless Steel

Product Description

The VLIER SPRSN250 is a stainless steel pull ring plunger designed for precision indexing, positioning, and light-duty locking applications in mechanical assemblies. It features a 1/4-20 thread with a thread length of 0.31 inches and a non-locking, spring-loaded plunger with a diameter of 0.16 inches and a projection of 0.19 inches. The pull ring allows manual retraction of the plunger without tools, making it well suited for fixtures, jigs, and machine components where repeatable positioning under moderate spring force is required. End force ranges from 0.5 pounds initial to 2 pounds final.

This plunger is used in industrial and mechanical applications where a threaded, spring-loaded detent or stop point is needed. Typical installations include tooling fixtures, adjustment panels, drawer slides, and indexing mechanisms in both light manufacturing and maintenance environments. The pull ring design allows the plunger to be retracted by hand, which is useful in assemblies that require frequent repositioning or access. The stainless steel construction suits environments where corrosion resistance is a factor.

Key Features

• Pull ring allows tool-free manual plunger retraction
• Non-locking spring-loaded design for repeatable detent positioning
• Stainless steel construction for corrosion resistance
• 1/4-20 thread for straightforward installation into standard tapped holes
• End force range of 0.5 pounds initial to 2 pounds final for light-duty indexing
• Compact body length of 0.44 inches suits tight assembly clearances

Compatibility

Designed as a standard 1/4-20 threaded spring plunger for use in mechanical assemblies, tooling fixtures, and industrial equipment requiring a non-locking pull ring detent plunger.

Installation Notes

Installation is performed by threading the SPRSN250 into a pre-tapped 1/4-20 hole using a 0.25 inch hex wrench on the head. Ensure the mating hole is clean and free of debris before installation. De-energize or lock out any powered equipment before servicing assemblies that contain spring plungers. Do not overtighten, as excessive torque can damage the plunger body or compress the internal spring beyond its design range.