Vlier NS54 Threaded Spring Plunger 1/4-20 Steel Body

Product Description

The VLIER NS54 is a standard threaded spring plunger designed for use in positioning, indexing, and light-duty detent applications across industrial and mechanical assemblies. It features a 1/4-20 thread with a 1 inch thread length and a steel body for durability in demanding environments. The phenolic nose resists wear and reduces marring on mating surfaces. With an initial end force of 3 pounds and a final end force of 13 pounds, it delivers consistent, repeatable spring tension suited to precision fit-up work. Machinists, tool and die technicians, and mechanical assembly specialists are the primary installers of this component.

This spring plunger is used in jigs, fixtures, tooling plates, and machine components where controlled detent or positioning force is needed. The 1/4-20 threaded body allows installation into standard tapped holes in steel, aluminum, or plastic workpieces. The 3/16 inch plunger projection provides adequate engagement depth for most light-load indexing applications. It is suited to both production tooling environments and custom fixture builds in manufacturing and fabrication settings.

Key Features

• 1/4-20 thread for installation into standard tapped holes
• 1 inch thread length and 1 inch steel body length for secure engagement
• Phenolic nose material minimizes surface marring on mating components
• 3 pound initial end force and 13 pound final end force for controlled detent action
• Plunger diameter range of 0.116 to 0.118 inches for consistent fit
• No locking element - straightforward threaded installation and removal

Compatibility

Designed as an OEM-style replacement or direct-fit component for standard 1/4-20 tapped bore applications in industrial jigs, fixtures, and tooling assemblies.

Installation Notes

Installation is performed by machinists or mechanical assembly technicians using a standard hex key or spanner wrench appropriate for the plunger body. The mating hole must be tapped to 1/4-20 specification and kept free of debris before threading in the plunger. Power down or de-energize any associated machinery before servicing components in the assembly. Do not overtighten, as this can compress the internal spring beyond its rated travel and reduce detent performance.