Vlier SSSD55 Threaded Spring Plunger 1/4-20 Stainless Steel

Product Description

The VLIER SSSD55 is a threaded spring plunger designed for indexing, positioning, and light-duty detention applications in mechanical assemblies. It features a 1/4-20 thread with a 1 inch thread length and a stainless steel body for corrosion resistance in demanding environments. The Delrin nose provides a low-friction, non-marring contact point. Initial end force is 1 pound and final end force is 4 pounds, making it suited for applications requiring controlled, repeatable engagement. The plunger diameter ranges from 0.116 to 0.118 inches with a 3/16 inch projection. Machinists, toolmakers, and mechanical assembly technicians install this type of component.

The SSSD55 is used in fixtures, jigs, machine tool components, and production assembly equipment where repeatable part positioning or light retention is required. Its stainless steel body makes it appropriate for washdown environments, cleanrooms, and food-processing or medical equipment where carbon steel hardware is not acceptable. The standard-length plunger profile fits standard threaded bores without modification. This plunger is installed by hand or with a hex wrench depending on the drive configuration of the bore.

Key Features

• 1/4-20 thread size with 1 inch thread length for standard threaded bore installation
• Stainless steel body for corrosion resistance in harsh or washdown environments
• Delrin nose provides non-marring, low-friction plunger contact
• 1 pound initial end force and 4 pound final end force for light-duty positioning applications
• 3/16 inch plunger projection with plunger diameter of 0.116 to 0.118 inches
• No locking element - allows removal and reinstallation without thread-locking compounds

Compatibility

Designed as an OEM-style replacement or direct-fit component for standard 1/4-20 threaded bores in mechanical fixtures, jigs, and assembly tooling.

Installation Notes

Installation is performed by machinists or mechanical assembly technicians using standard hand tools appropriate for the threaded bore. Ensure the mating bore is clean and threads are free of debris before installation. De-energize or lock out any machinery before servicing components in moving assemblies. Do not overtighten, as stainless steel fasteners are susceptible to galling - apply an appropriate anti-seize compound if the plunger may require future removal.