Vlier SSM51P Threaded Spring Plunger 8-36 Stainless Steel

Product Description

The VLIER SSM51P is a stubby threaded spring plunger designed for precise positioning, indexing, and light-duty detent applications in mechanical assemblies. Built with a stainless steel body and stainless steel nose, it delivers corrosion resistance suited to demanding environments. The 8-36 thread size with a 0.437-inch thread length keeps the overall footprint compact. A locking element is incorporated into the body to secure the plunger in the threaded bore once installed. Initial end force is 0.5 pounds and final end force is 1.5 pounds, providing consistent, repeatable spring tension across the plunger travel. Mechanical assemblers, toolmakers, and precision fabricators install this component in fixtures, jigs, and production equipment.

The SSM51P is suited for light-load positioning and detent applications where a low-profile, stubby plunger body is required. The 8-36 thread makes it compatible with fine-threaded bores in aluminum, steel, or similar materials commonly found in precision fixtures and automated assembly tooling. The locking element eliminates the need for thread adhesive to prevent loosening under vibration, making it a practical choice in equipment subject to cyclic loading or frequent adjustment.

Key Features

• Stainless steel body and nose for corrosion resistance
• 8-36 thread size with 0.437-inch thread length for compact installation
• Stubby plunger length type for low-profile applications
• Locking element integrated into body to resist loosening under vibration
• 0.5-pound initial end force and 1.5-pound final end force for light-duty detent use
• Maximum plunger diameter of 0.07 inches for fine-clearance bores

Compatibility

Designed as a direct-fit replacement or new-installation spring plunger for threaded bores accepting an 8-36 thread form in precision mechanical assemblies, fixtures, and jigs.

Installation Notes

Installation requires a properly tapped 8-36 threaded bore in the mating component. Use an appropriate driver or spanner tool rated for the body size to avoid deforming the plunger head. Ensure the mating assembly is de-energized and depressurized before servicing any fixture or equipment containing this plunger. The integrated locking element provides resistance to back-out, but verify seating depth against assembly drawings to achieve correct projection.