Vlier SSM8AN Threaded Spring Plunger M8 X 1.25 Ss

Product Description

The VLIER SSM8AN is a threaded spring plunger designed for positioning, indexing, and light-duty locking applications in mechanical assemblies. It features an M8 x 1.25 thread with a body and nose constructed entirely of stainless steel, making it suitable for environments where corrosion resistance is required. The plunger delivers an initial end force of 5.62 pounds and a final end force of 15.74 pounds, providing reliable, repeatable engagement. A built-in locking element secures the plunger in its installed position, preventing loosening from vibration. Machinists, toolmakers, and mechanical assemblers typically install this type of hardware during fixture or equipment assembly.

This spring plunger installs into threaded holes on jigs, fixtures, tooling plates, and mechanical housings where controlled ball or pin engagement is needed. The M8 x 1.25 thread size is a standard metric fastener pitch, fitting common threaded inserts and machined bores across a wide range of industrial and OEM equipment. The standard plunger length of 0.866 inches makes it well suited for moderate-depth installations. The locking element allows the plunger body to be torqued securely without requiring thread-locking compounds.

Key Features

• M8 x 1.25 metric thread for compatibility with standard machined bores
• Stainless steel body and nose for corrosion resistance in demanding environments
• Initial end force of 5.62 pounds and final end force of 15.74 pounds for consistent engagement
• Integrated locking element prevents back-out under vibration without adhesives
• Standard plunger length of 0.866 inches suits moderate-depth threaded applications
• Maximum plunger diameter of 0.138 inches for precise fit in indexed locating applications

Compatibility

Designed as a standard metric threaded spring plunger for use in machined fixtures, tooling plates, and mechanical assemblies that accept an M8 x 1.25 threaded bore.

Installation Notes

Installation is performed using a hex wrench or spanner tool appropriate for the plunger body drive style. Disengage or de-energize any moving components in the assembly before installing or removing the plunger. The integrated locking element eliminates the need for thread-locking fluid, but the mating threaded bore should be clean and free of debris before installation. Do not overtighten, as this can deform the locking element or damage the plunger nose.