Vlier NM63 Threaded Spring Plunger 5/8-11 Steel Body

Product Description

The VLIER NM63 is a threaded spring plunger designed for indexing, positioning, and light-duty detent applications in mechanical assemblies. It features a 5/8-11 thread with a body length of 1.062 inches and a stubby plunger configuration with a maximum plunger diameter of 0.31 inches and a projection of 0.215 inches. The steel body provides solid resistance to side loads, while the Delrin nose reduces friction and wear on mating surfaces. Initial end force is 2 pounds, rising to a final end force of 8.5 pounds at full compression. This part is installed by machinists, tool-and-die technicians, and mechanical assemblers.

The NM63 fits applications where a low-profile, stubby plunger is required - typically in jigs, fixtures, tooling plates, and precision mechanical assemblies where controlled detent force and repeatable positioning are needed. The 5/8-11 thread allows installation into standard tapped holes in steel, aluminum, or other structural materials. The relatively modest force range makes it well suited for lighter indexing loads where component damage from excess spring force is a concern.

Key Features

• 5/8-11 thread with 1.062 inch thread length for straightforward installation in standard tapped holes
• Stubby plunger type with 0.215 inch projection - compact profile for space-constrained assemblies
• Steel body construction for durability under side load and torque
• Delrin nose material minimizes wear on mating surfaces and reduces friction
• 2 pound initial end force and 8.5 pound final end force for predictable, repeatable detent action
• No locking element - allows removal and repositioning without thread-locking compound

Compatibility

Designed as a standard threaded spring plunger for use in machined fixtures, jigs, tooling plates, and mechanical assemblies requiring 5/8-11 threaded detent or positioning hardware.

Installation Notes

Installation is performed by qualified machinists or mechanical assemblers using a hex wrench or spanner appropriate for the body size. Ensure the receiving tapped hole is clean, properly sized for 5/8-11 thread, and free of debris before threading in the plunger. Do not overtighten, as excessive torque can damage the internal spring or distort the body. Confirm plunger movement is smooth and unobstructed after installation before placing the assembly into service.