Vlier DSSBL54 Threaded Ball Plunger 1/4-20 Stainless

Product Description

The VLIER DSSBL54 is a threaded ball plunger designed for controlled end-force applications in mechanical assemblies and positioning systems. It features a 1/4-20 thread size with a stainless steel body and a nylon ball measuring 0.125 inches in diameter. The body length is 0.531 inches, and the maximum ball reach is 0.035 inches. Initial end force is 2 pounds and final end force is 4 pounds, making this plunger suitable for light-duty detent, indexing, and positioning functions. It is installed by mechanical assemblers and maintenance technicians in production and service environments.

This ball plunger is intended for use in jigs, fixtures, tooling plates, and machine components where repeatable detent positioning or controlled spring-loaded contact is required. The nylon ball reduces the risk of marring or damaging mating surfaces, making it appropriate for applications involving softer substrates or finished workpieces. The 1/4-20 thread allows installation in standard tapped holes found in common tooling and fixture stock.

Key Features

• 1/4-20 thread size for installation in standard tapped holes
• Stainless steel body with zinc-plated finish for corrosion resistance
• Nylon ball minimizes surface marring on mating components
• Controlled end force: 2 pounds initial, 4 pounds final
• 0.125 inch ball diameter with 0.035 inch maximum ball reach
• Purple color code for quick field identification

Compatibility

Designed as a direct-threaded replacement or new installation ball plunger for applications requiring 1/4-20 thread size with controlled end-force characteristics in light-duty detent and positioning assemblies.

Installation Notes

Installation is performed by threading the plunger into a pre-tapped 1/4-20 hole using a standard hex key or wrench on the body flats. Ensure the mating hole is clean and free of debris before installation to prevent cross-threading. Do not overtighten, as this can restrict ball travel or damage the nylon ball. Verify ball reach and end-force values are appropriate for the intended detent or positioning load before finalizing installation.