Vlier SSSD51 Threaded Spring Plunger 8-32 Stainless Steel

Product Description

The VLIER SSSD51 is a threaded spring plunger designed for indexed positioning, detent, and light-duty locking applications in mechanical assemblies. The body is machined from stainless steel and accepts standard 8-32 threaded installation. The plunger tip is made from Delrin, which provides a low-friction nose suitable for contact with metal or plastic mating surfaces. With an initial end force of 0.70 pounds and a final end force of 2.30 pounds, the SSSD51 delivers a predictable, repeatable engagement force across its 3/32-inch projection. Machinists, tool and die technicians, and mechanical assembly professionals install this type of plunger in jigs, fixtures, and precision mechanical components.

The SSSD51 is suited for use in light industrial and precision mechanical assemblies where repeatable positioning or detent action is required. The 8-32 thread size and 5/8-inch thread length make it compatible with standard tapped holes in aluminum, steel, and engineering plastic housings. Typical applications include fixture plates, sliding mechanisms, and panel-mount assemblies where the plunger must engage a detent pocket or register a moving component into a set position.

Key Features

• Stainless steel body provides corrosion resistance in wash-down or humid environments
• Delrin nose material reduces friction and wear at the contact point
• 0.70 pounds initial end force and 2.30 pounds final end force for predictable detent engagement
• Standard 8-32 thread size fits common tapped holes without custom tooling
• 3/32-inch plunger projection for consistent indexing depth
• No locking element - thread-in installation with standard hex or driver tooling

Compatibility

Designed as a standard-thread spring plunger for use in tapped 8-32 holes in jigs, fixtures, and mechanical assemblies requiring light detent or indexing force.

Installation Notes

Install using a hex key or flat driver into a clean, properly tapped 8-32 through or blind hole. Ensure threads are free of chips and debris before installation to prevent galling on the stainless steel body. De-energize or lock out any powered equipment before installing or servicing plungers in active machinery. Do not over-torque during installation, as the non-locking body relies on thread friction alone to hold position.