Vlier SSSD58 Threaded Spring Plunger 3/8-16 Ss

Product Description

The VLIER SSSD58 is a standard threaded spring plunger designed for indexing, positioning, and light-duty locking applications in industrial assemblies and fixtures. The body is machined from stainless steel for corrosion resistance, and the nose is Delrin for low-friction contact against mating surfaces. It installs into a tapped 3/8-16 hole with a thread length of 1.125 inches. The plunger delivers an initial end force of 5.5 pounds and a final end force of 14.5 pounds, with a projection of 0.1875 inches and a plunger diameter ranging from 0.186 to 0.187 inches. Machinists, toolmakers, and MRO maintenance technicians are the typical installers.

This spring plunger suits standard-length plunger applications in machined fixtures, jigs, and mechanical assemblies where repeatable detent action is required. The stainless steel body makes it appropriate for environments with exposure to moisture, mild chemicals, or wash-down conditions. The Delrin nose reduces wear on softer mating surfaces and minimizes galling. No locking element is included, so the plunger relies on thread engagement and fit for retention in the tapped bore.

Key Features

• Stainless steel body provides corrosion resistance for demanding environments
• Delrin nose reduces friction and wear on contact surfaces
• 3/8-16 thread with 1.125-inch thread length for secure installation in standard tapped holes
• Initial end force of 5.5 pounds and final end force of 14.5 pounds for reliable detent action
• Standard plunger length type with 0.1875-inch projection
• No locking element - straightforward installation and removal

Compatibility

Designed for installation into standard 3/8-16 tapped holes in machined fixtures, jigs, tooling plates, and mechanical assemblies requiring spring-loaded plunger detent or positioning function.

Installation Notes

Installation is performed by toolmakers or maintenance technicians using a hex wrench or spanner tool appropriate for the plunger body style. Ensure the tapped hole is clean and free of debris before threading the plunger in. Do not overtighten, as this can compress the spring beyond its design range or damage the Delrin nose. No special certifications are required for installation, but follow applicable facility safety lockout procedures when installing in live machinery.