Vlier B58 Threaded Ball Plunger 3/8-16 Steel

Product Description

The VLIER B58 is a threaded ball plunger designed to provide controlled end force in mechanical positioning, detent, and alignment applications. This compact, spring-loaded device features a 0.188-inch steel ball and a steel body with a 3/8-16 thread for straightforward installation into tapped holes. The body measures 0.625 inches in length, and the ball extends a maximum of 0.048 inches beyond the body face. Initial end force is 5 pounds, with a final end force of 10 pounds. The B58 is identified by a purple color code for quick field identification. Installers favor this type of plunger when precision positioning and repeatable force engagement are required in tight mechanical assemblies.

The B58 is suited for light-duty industrial, mechanical, and OEM assembly applications where a small-footprint, spring-loaded detent or locating device is needed. Its 3/8-16 thread makes it compatible with standard tapped hole patterns common in machine frames, fixtures, and equipment panels. The controlled end-force range makes it appropriate for applications requiring consistent, repeatable engagement without excessive force on mating components.

Key Features

• 3/8-16 threaded body for installation into standard tapped holes
• 0.188-inch diameter steel ball for precise point contact
• Maximum ball reach of 0.048 inches for controlled, low-profile engagement
• 5-pound initial end force and 10-pound final end force for consistent detent action
• Steel body and steel ball construction for durability in mechanical environments
• Purple color code for fast identification among multiple plunger variants

Compatibility

Designed as a standard 3/8-16 threaded ball plunger for use in mechanical assemblies, fixtures, and OEM equipment requiring spring-loaded detent or positioning functionality.

Installation Notes

Installation requires a tapped 3/8-16 hole in the mounting body. A hex wrench or appropriate driver should be used to thread the plunger in to the desired engagement depth. Ensure the mating surface or detent groove aligns with the ball travel path before final tightening. Verify end-force requirements against the application before installation to confirm this plunger grade is appropriate.