Vlier ND54 Threaded Ball Plunger 1/4-20 Delrin Nylon Ball

Product Description

The VLIER ND54 is a threaded ball plunger designed for light-duty indexing, positioning, and detent applications in mechanical assemblies. It features a 1/4-20 thread for direct installation into tapped holes and uses a Delrin body paired with a Nylon ball to provide corrosion resistance and low friction contact. The ball diameter is 0.125 inches with a body length of 0.531 inches and a maximum ball reach of 0.03 inches. Initial end force is 2 pounds, rising to a final end force of 5 pounds, making it suitable for applications requiring a light, consistent spring-loaded engagement. Machinists, maintenance technicians, and precision assembly professionals install this type of component.

The ND54 is used in light mechanical assemblies where repeatable positioning or soft detent action is needed without marring contact surfaces. The Nylon ball material is well suited for applications involving softer substrates or where metal-to-metal contact would cause wear or damage. Common install scenarios include sliding fixtures, tooling plates, jig assemblies, and drawer or panel positioning systems in both industrial and light commercial equipment. The white color code on this plunger aids in quick visual identification when multiple spring-force variants are used in the same assembly.

Key Features

• 1/4-20 threaded body installs directly into standard tapped holes
• Delrin body provides corrosion resistance and dimensional stability
• Nylon ball protects soft or finished contact surfaces from marring
• 2-pound initial end force and 5-pound final end force for light detent action
• 0.125-inch ball diameter with 0.03-inch maximum ball reach for controlled engagement
• White color code for fast visual identification of spring-force rating

Compatibility

Designed as a standard 1/4-20 threaded ball plunger replacement or new-install component suitable for light-duty indexing and positioning applications in mechanical assemblies accepting a 1/4-20 threaded insert.

Installation Notes

Installation is performed by threading the ND54 directly into a tapped 1/4-20 hole using a hex key or appropriate driver on the plunger body. De-energize or mechanically lock any moving assembly before installing or removing ball plungers to prevent injury from unexpected motion. Do not overtighten, as Delrin threads can be damaged by excessive torque. Confirm ball reach clearance against mating surfaces before finalizing installation.