Vlier NS51P Threaded Spring Plunger 8-32 5/8 in Steel

Product Description

The VLIER NS51P is a threaded spring plunger designed for precision positioning, indexing, and light-duty locking applications in mechanical assemblies. It features an 8-32 thread size with a 5/8-inch thread length and a steel body for durability in industrial environments. The phenolic nose keeps the plunger tip non-marring, making it suitable for use against finished or coated surfaces. Initial end force is 0.70 pounds, with a final end force of 2.30 pounds, providing consistent spring-loaded engagement. A locking element is integrated into the body to secure the plunger position once installed. Typically specified by mechanical engineers and installed by machinists or maintenance technicians.

The NS51P is suited for use in jigs, fixtures, tooling plates, and light machinery where repeatable positioning or detent action is required. The standard plunger length type and compact 3/32-inch projection make it appropriate for shallow-travel applications where space is limited. It is commonly installed in drilled and tapped holes in metal or plastic workpieces across manufacturing, assembly, and automation environments.

Key Features

• 8-32 thread size with 5/8-inch thread length for standard tapped-hole installation
• Steel body construction for strength and resistance to wear
• Phenolic nose material provides non-marring contact with mating surfaces
• Integrated locking element secures plunger position after adjustment
• 0.70 lb initial end force and 2.30 lb final end force for controlled spring engagement
• 3/32-inch plunger projection for compact, shallow-travel detent applications

Compatibility

Designed as an OEM-style replacement or direct-fit spring plunger for standard 8-32 tapped holes in jigs, fixtures, tooling plates, and mechanical assemblies requiring spring-loaded positioning or detent action.

Installation Notes

Installation requires a properly tapped 8-32 hole to the specified thread depth. Use an appropriate driver or wrench on the body flats to thread the plunger in place; engage the locking element per standard procedure to prevent loosening under vibration. De-energize or lock out any powered equipment before servicing assemblies containing this component. Do not exceed the rated end force range by over-compressing the plunger during installation.