Vlier DSSBL56 Threaded Ball Plunger 5/16-18

Product Description

The VLIER DSSBL56 is a threaded ball plunger with a 5/16-18 thread size, designed to provide controlled positioning and light detent action in mechanical assemblies. The body is machined from stainless steel and features a nylon ball with a 0.156-inch diameter and a maximum ball reach of 0.04 inches. Initial end force is 2 pounds, with a final end force of 4.25 pounds. This plunger installs into tapped holes and is used by machinists, maintenance technicians, and assembly professionals to index, locate, or retain moving components without a locking element.

The DSSBL56 is suited for light-duty positioning applications in manufacturing jigs, fixtures, and mechanical assemblies where a non-locking detent is required. The nylon ball reduces marring on softer mating surfaces, making it appropriate for use against aluminum, plastic, or coated components. The zinc-plated finish on applicable surfaces and purple color code assist with quick part identification during assembly or maintenance operations.

Key Features

• 5/16-18 threaded body for direct installation into standard tapped holes
• Stainless steel body provides corrosion resistance in demanding environments
• Nylon ball minimizes surface marring on soft or coated mating components
• 2-pound initial end force and 4.25-pound final end force for light detent control
• 0.04-inch maximum ball reach suitable for shallow detent groove applications
• Purple color code enables fast visual identification during assembly

Compatibility

Designed as an OEM-style replacement or direct-fit component for mechanical assemblies requiring a 5/16-18 threaded non-locking ball plunger.

Installation Notes

Installation requires a properly tapped 5/16-18 hole and standard hex or torque tools appropriate to the application. Ensure the mating assembly is de-energized and stationary before installing or replacing plungers in live machinery. Do not exceed the rated end force by over-driving the plunger into the bore, as this can deform the nylon ball and reduce detent effectiveness. Follow the equipment manufacturer's assembly specifications for thread engagement depth.