Vlier NM58 Threaded Spring Plunger 3/8-16 Steel

Product Description

The VLIER NM58 is a threaded spring plunger designed for positioning, indexing, and light-duty detent applications in industrial and mechanical assemblies. The body is machined from steel with a Delrin nose, providing a firm yet low-friction contact point. Thread size is 3/8-16 with a thread length of 0.625 inches and a stubby plunger projection of 0.11 inches. Initial end force is 4.5 pounds and final end force is 18.5 pounds, making this plunger suitable for applications requiring a defined resistance or detent feel under load. Mechanical assemblers and maintenance technicians install this type of component in fixtures, jigs, tooling plates, and machine housings.

This plunger is used in light industrial settings where a spring-loaded contact point is needed to locate, retain, or index a moving part. The stubby plunger style and compact 0.625-inch body length make it well suited for installations with limited axial clearance. It threads directly into a tapped 3/8-16 hole and requires no additional hardware. Typical applications include tooling fixtures, panel assemblies, sliding mechanisms, and equipment housings where repeatable positioning is required.

Key Features

• 3/8-16 threaded body for direct installation into standard tapped holes
• Stubby plunger style with 0.11 inch projection for tight-clearance installations
• Steel body construction for durability in industrial environments
• Delrin nose material provides low-friction, non-marring contact
• 4.5 pound initial end force and 18.5 pound final end force for defined detent resistance
• No locking element - standard installation and removal with common hand tools

Compatibility

Designed as a standard OEM-style threaded spring plunger for use in any assembly or fixture with a tapped 3/8-16 hole requiring spring-loaded positioning or detent retention.

Installation Notes

Installation is performed with standard hand tools sized for a 3/8-16 threaded fastener. Ensure the receiving hole is clean and properly tapped to 3/8-16 before threading in the plunger. Do not overtighten, as excessive torque can damage the spring mechanism or body threads. Confirm plunger projection and force values are appropriate for the application before final assembly.