Vlier FRSN500P Spring Plunger 1/2-13 Non-locking L Handle

Product Description

The VLIER FRSN500P is a non-locking spring plunger with an L-style steel handle, designed for indexing, positioning, and light-duty hold applications in mechanical assemblies. The plunger body threads into a tapped hole using a 1/2-13 thread and delivers an initial end force of 0.5 pounds and a final end force of 2 pounds, making it suitable for repeatable, controlled detent action. The plunger diameter is 0.31 inches with a projection of 0.4 inches. Total body length is 1.5 inches, with a thread length of 0.85 inches and a length under head of 1 inch. Machinists, toolmakers, and maintenance technicians install this type of plunger in fixtures, jigs, and production equipment.

The FRSN500P is applied in mechanical fixturing, tooling plates, and machine assemblies where a spring-loaded detent or stop point is required. Its non-locking plunger design allows free retraction without a secondary release mechanism, making it practical for high-cycle indexing applications. The L-handle configuration allows hand adjustment and installation without additional tooling in accessible locations. This plunger is appropriate for use in both production and maintenance environments across general manufacturing and precision assembly operations.

Key Features

• Non-locking plunger for free retraction in detent and indexing applications
• 1/2-13 thread for installation in standard tapped holes
• End force range of 0.5 pounds initial to 2 pounds final for controlled spring resistance
• L-style steel handle allows hand tightening and removal in accessible locations
• 0.4 inch plunger projection provides positive detent engagement
• Compact 1.5 inch body length suits space-constrained fixture designs

Compatibility

Designed as an OEM-style replacement or new-install spring plunger for mechanical fixtures, jigs, and tooling assemblies requiring a 1/2-13 threaded non-locking plunger.

Installation Notes

Installation is performed by toolmakers, machinists, or maintenance technicians. Thread the plunger body into a pre-tapped 1/2-13 hole and tighten to the desired position using the L handle or an appropriate hex wrench on the 0.5 inch hex. Ensure the mating bore or detent feature is aligned with the plunger projection before final seating. De-energize or lock out any associated equipment before installing or servicing plungers in active machinery.