Vlier SSBH54N Threaded Ball Plunger 1/4-20 Stainless Steel

Product Description

The VLIER SSBH54N is a threaded ball plunger designed for controlled end-force applications where precise, repeatable positioning is required. The plunger features a stainless steel body and stainless steel ball, making it suitable for environments where corrosion resistance matters. With a 1/4-20 thread size, a body length of 0.531 inches, and a ball diameter of 0.125 inches, this is one of the smallest and lightest spring-loaded positioning devices in the category. A built-in locking element secures the plunger in place after installation, preventing loosening from vibration or repeated cycling. Initial end force is 4 pounds with a final end force of 12 pounds.

The SSBH54N is used in precision mechanical assemblies, jigs, fixtures, tooling, and light industrial equipment where controlled detent or positioning force is needed in a compact form factor. The small thread size and minimal ball reach of 0.035 inches make it well suited for thin-material applications and close-tolerance assemblies. It is typically installed by machinists, toolmakers, and mechanical assembly technicians working with positioning mechanisms, indexing plates, or component retention applications.

Key Features

• 1/4-20 thread size for standard tapped-hole installation
• Stainless steel body and ball for corrosion resistance
• Locking element prevents back-out under vibration or repeated cycling
• 4 pounds initial end force and 12 pounds final end force for controlled detent action
• Maximum ball reach of 0.035 inches suits close-tolerance and thin-material assemblies
• Compact profile: 0.531 inches body length and 0.125 inches ball diameter

Compatibility

Designed as a spring-loaded threaded ball plunger for use in any tapped 1/4-20 hole requiring controlled end-force positioning or detent retention in mechanical assemblies.

Installation Notes

Installation requires a pre-tapped 1/4-20 hole in the mating component. Power down or de-energize any associated equipment before installing or removing the plunger. Use a standard hex wrench or driver appropriate for the drive feature; do not over-torque, as this can damage the locking element or distort the thread. Verify ball engagement depth against the 0.035-inch maximum ball reach before finalizing assembly.