Vlier SSB58 Threaded Ball Plunger 3/8-16 Stainless Steel

Product Description

The VLIER SSB58 is a threaded ball plunger designed for controlled end-force applications in precision positioning, detenting, and indexing assemblies. The plunger features a stainless steel body with a 3/8-16 thread and a stainless steel ball measuring 0.188 inches in diameter. It delivers 5 pounds of initial end force and 10 pounds of final end force, making it suitable for light-duty spring-loaded detent work where consistent, repeatable force is required. The 5/8-inch body length and 0.048-inch maximum ball reach keep the installed profile compact. Machinists, toolmakers, and mechanical assemblers are the typical installers of this component.

This ball plunger is well suited for use in jigs, fixtures, machine tools, and precision mechanical assemblies where a small, spring-loaded detent device is needed. Its stainless steel construction makes it appropriate for environments where corrosion resistance is a consideration, such as food processing equipment, wet environments, or cleanroom tooling. The 3/8-16 threaded body installs directly into a tapped hole, requiring no additional hardware.

Key Features

• 3/8-16 threaded body for direct installation into standard tapped holes
• Stainless steel body and ball for corrosion resistance
• 0.188-inch ball diameter with 0.048-inch maximum ball reach
• 5 lb initial end force and 10 lb final end force for controlled detent action
• Compact 5/8-inch body length - one of the smallest and lightest spring-loaded plunger configurations available
• No locking element, allowing straightforward installation and removal

Compatibility

Designed as a direct-thread replacement or new-install ball plunger for jigs, fixtures, and precision mechanical assemblies requiring a 3/8-16 threaded spring-loaded detent device.

Installation Notes

Installation requires a properly tapped 3/8-16 hole in the mating component. Use an appropriate hex key or spanner tool as specified for the plunger body style - do not overtighten, as this can preload the spring beyond its design range. Ensure the ball and bore are free of chips or debris before installation. Depressurize or de-energize any assembly before servicing plungers in active tooling or machinery.