Vlier NS58N Threaded Spring Plunger 3/8-16 Steel Locking

Product Description

The VLIER NS58N is a threaded spring plunger designed for positioning, indexing, and light-duty locking applications in mechanical assemblies. It features a 3/8-16 thread with a 1-1/8 inch thread length and a phenolic nose with a 3/16 inch projection. The steel body provides durability under repeated cycling. Initial end force is 5.5 pounds and final end force is 14.5 pounds, making it suitable for applications that require a firm, repeatable detent. A built-in locking element secures the plunger in the threaded bore once installed. This part is typically installed by machinists, tool and die technicians, and mechanical assembly technicians.

The NS58N fits standard threaded bores in jigs, fixtures, tooling plates, and machine components where a spring-loaded detent or indexing point is required. The phenolic nose minimizes surface marring on mating parts, making it appropriate for applications involving finished or soft material surfaces. This is a standard-length plunger suitable for through-hole or blind-threaded installations in both production and maintenance settings.

Key Features

• 3/8-16 threaded body with 1-1/8 inch thread length for secure installation in standard tapped bores
• Steel body construction for durability in industrial and tooling environments
• Phenolic nose minimizes marring on contact surfaces
• 3/16 inch plunger projection with 5.5 pound initial end force and 14.5 pound final end force
• Integrated locking element prevents back-out once torqued into the bore
• Standard plunger length type for common fixture and tooling applications

Compatibility

Designed as an OEM-style replacement or direct installation component for mechanical fixtures, jigs, tooling plates, and assemblies requiring a 3/8-16 threaded spring plunger with a standard body length.

Installation Notes

Installation is performed by threading the plunger body into a tapped 3/8-16 bore using a hex key or spanner tool appropriate for the drive style. Ensure the bore is clean and free of debris before installation. The locking element engages as the plunger is torqued to the specified seating position - do not over-torque, as this can damage the locking element or bore threads. Always verify plunger projection and end force values are appropriate for the mating component before finalizing installation.