Vlier SSPH51 Threaded Spring Plunger 8-32 Stainless Steel

Product Description

The VLIER SSPH51 is a standard-length threaded spring plunger designed for precise, repeatable positioning and indexing in mechanical assemblies. Featuring an 8-32 thread size and a 5/8 inch thread length, this plunger installs into a tapped bore and uses internal spring force to apply controlled end pressure against a mating surface or detent. The stainless steel body and nose offer corrosion resistance suitable for demanding environments. Initial end force is 0.70 pounds, middle end force is 1.50 pounds, and final end force is 2.30 pounds, giving technicians and machinists a predictable force curve across the full plunger travel range.

The SSPH51 is used in light-duty positioning, alignment, and detent applications across industrial machinery, tooling fixtures, jigs, and precision mechanical assemblies. Its compact 0.07 inch plunger diameter and 3/32 inch projection make it well suited for tight-clearance installations where space is limited. This type of plunger is typically installed by machinists, tool and die makers, mechanical assemblers, and maintenance technicians working on production or service equipment.

Key Features

• 8-32 thread size with 5/8 inch thread length for standard tapped-bore installation
• Stainless steel body and nose material for corrosion resistance
• 3/32 inch plunger projection provides controlled engagement depth
• Progressive spring force: 0.70 lb initial, 1.50 lb middle, 2.30 lb final end force
• Standard plunger length type for drop-in replacement in existing assemblies
• No locking element - free-spinning installation without thread locking feature

Compatibility

Designed as an OEM-style replacement or direct-fit component for mechanical assemblies requiring an 8-32 threaded spring plunger with standard projection and stainless steel construction.

Installation Notes

Installation requires a properly tapped 8-32 bore in the receiving component. Power down or de-energize any equipment before servicing assemblies containing this plunger. A hex wrench sized to the 0.063 inch hex is used for installation and removal. Do not overtighten, as the plunger body is stainless steel and thread damage can result from excessive torque.