Vlier SSSD63 Threaded Spring Plunger 5/8-11 Stainless Steel

Product Description

The VLIER SSSD63 is a threaded spring plunger designed for indexing, locating, and positioning applications in industrial and mechanical assemblies. It features a 5/8-11 thread with a 1-1/2 inch thread length and a standard-length stainless steel body. The nose is machined from Delrin, providing low-friction contact against mating surfaces. The plunger delivers an initial end force of 3.5 pounds and a final end force of 10.5 pounds, making it suitable for applications that require consistent, repeatable engagement under moderate load. Machinists, toolmakers, and maintenance technicians typically specify and install this hardware.

This spring plunger is used in jigs, fixtures, tooling plates, machine tool components, and general mechanical assemblies where a threaded-body positioning element is required. The 5/16 inch projection and 0.31 inch plunger diameter suit tight-tolerance bores and precision fixture work. It is applicable in both light manufacturing and production environments where stainless steel corrosion resistance is preferred over carbon steel alternatives.

Key Features

• 5/8-11 threaded body for direct installation into tapped holes
• 1-1/2 inch thread length accommodates standard fixture plate thicknesses
• Stainless steel body resists corrosion in washdown and high-humidity environments
• Delrin nose reduces wear and provides smooth, low-friction plunger contact
• 3.5 pound initial end force and 10.5 pound final end force for consistent spring-loaded engagement
• No locking element - suitable for applications requiring straightforward threaded installation without thread-lock features

Compatibility

Designed as an OEM-style replacement or direct-fit spring plunger for any tapped 5/8-11 threaded hole requiring a standard-length stainless steel spring plunger with a 5/16 inch projection.

Installation Notes

Install using a hex key or spanner wrench sized to the body flats; do not use pliers directly on the plunger nose. Ensure the tapped hole is clean and free of debris before threading in the plunger. De-energize or lock out any machinery before servicing fixtures or tooling plates that contain spring plungers. Apply thread sealant or thread-locking compound only if specified by the fixture design, as this part has no integral locking element.