Vlier SSSD54A Threaded Spring Plunger 1/4-28 Stainless Steel

Product Description

The VLIER SSSD54A is a threaded spring plunger designed for precise, repeatable positioning and indexing applications in mechanical assemblies. It features a 1/4-28 unified fine thread with a 1 inch thread length, a stainless steel body for corrosion resistance, and a Delrin nose that allows smooth contact with mating surfaces without marring them. The plunger delivers 3 pounds of initial end force and 13 pounds of final end force, making it suitable for light-to-moderate detent and locating functions. This part is installed by machinists, toolmakers, and mechanical technicians working on fixtures, jigs, and precision assemblies.

The SSSD54A is used in industrial and manufacturing environments where a compact, threaded detent or positioning element is required. Its 1/4-28 thread makes it compatible with standard tapped holes in tooling plates, fixture bodies, and machine frames. The standard plunger length type and 3/16 inch projection suit applications where a short, controlled engagement stroke is needed. No locking element is present, so the plunger threads freely into the tapped hole without a secondary locking feature.

Key Features

• 1/4-28 unified fine thread for installation into standard tapped holes
• Stainless steel body provides corrosion resistance in demanding environments
• Delrin nose minimizes surface marring on mating components
• 3 pound initial end force and 13 pound final end force for light-to-moderate detent loads
• 3/16 inch plunger projection suits short-stroke positioning applications
• No locking element - threads in and out freely for easy adjustment or replacement

Compatibility

Designed as a standard threaded spring plunger for use in any application accepting a 1/4-28 tapped hole where a spring-loaded detent or positioning element with a Delrin nose is required.

Installation Notes

Installation is performed by hand or with a hex key or spanner wrench appropriate for the plunger body drive feature. Ensure the mating tapped hole is clean and free of debris before threading in the plunger. No thread-locking compound is typically required unless the application involves significant vibration. Always de-energize or lock out any associated machinery before servicing or replacing spring plunger components in live fixtures or assemblies.