Vlier SSS59 Threaded Spring Plunger 3/8-16 Stainless

Product Description

The VLIER SSS59 is a threaded spring plunger designed for positive positioning, indexing, and light-duty retention applications in industrial and mechanical assemblies. The body and nose are both stainless steel construction, making this plunger suitable for corrosive or washdown environments. It features a 3/8-16 thread with a 1-1/8 inch thread length, a plunger diameter ranging from 0.186 to 0.187 inches, and a 3/16 inch projection. Initial end force is 2.8 pounds and final end force is 7.2 pounds. This type of component is typically installed by machinists, toolmakers, maintenance technicians, or mechanical assembly professionals.

The SSS59 is used in fixtures, jigs, machine tool components, and precision mechanical assemblies where repeatable spring-loaded positioning or light retention is required. The standard-length plunger profile fits standard threaded bores and is well suited to applications demanding corrosion resistance, such as food processing equipment, marine hardware, or clean-room tooling. No locking element is incorporated, making installation and removal straightforward in accessible threaded locations.

Key Features

• Stainless steel body and nose for corrosion resistance in demanding environments
• 3/8-16 thread size with 1-1/8 inch thread length for broad fixture compatibility
• 2.8 pound initial end force and 7.2 pound final end force for reliable spring-loaded positioning
• Plunger diameter 0.186 to 0.187 inches with 3/16 inch projection
• No locking element for simplified installation and adjustment
• Standard plunger length type for use in conventional threaded bores

Compatibility

Designed as an OEM-style replacement or direct-fit component for industrial fixtures, jigs, and mechanical assemblies requiring a 3/8-16 threaded spring plunger with standard-length body profile.

Installation Notes

Installation is performed by threading the plunger into a properly tapped 3/8-16 hole using an appropriate hex key or spanner tool on the body flats. Ensure the receiving bore is clean and free of debris before installation. Do not overtighten, as excessive torque may damage the spring mechanism or thread engagement. Always de-energize or lock out any associated machinery before servicing or replacing spring plungers in operating equipment.