Vlier SSMD50A Threaded Spring Plunger 8-32 Stainless Steel

Product Description

The VLIER SSMD50A is a stubby threaded spring plunger designed for light-duty indexing, positioning, and detent applications in mechanical assemblies. The plunger body is constructed from stainless steel, with a Delrin nose for smooth, low-friction contact against mating surfaces. It accepts an 8-32 thread with a thread length of 0.437 inches and delivers an initial end force of 1.50 pounds and a final end force of 4.75 pounds. Maximum plunger diameter is 0.07 inches with a projection of 0.052 inches. This part is installed by machinists, maintenance technicians, and assembly professionals working with precision mechanical components.

The SSMD50A is suited for applications requiring a compact, corrosion-resistant spring plunger in tight spaces where a standard-length body will not fit. The stubby body length of 0.437 inches makes it appropriate for thin panels, shallow housings, and close-tolerance assemblies across industrial, automation, and instrumentation applications. It installs directly into a tapped 8-32 hole without additional hardware. No locking element is present, so thread adhesive or a jam nut may be used when a fixed installation position is required.

Key Features

• Stubby body profile at 0.437 inches body length for shallow or tight installation clearances
• Stainless steel body provides corrosion resistance in demanding environments
• Delrin nose reduces friction and wear on mating contact surfaces
• 1.50 lb initial end force and 4.75 lb final end force for light-to-moderate detent action
• Standard 8-32 thread installs directly into a tapped hole
• No locking element - compatible with thread-lock compounds or jam nut retention

Compatibility

Designed as a direct-install OEM-style threaded spring plunger for any assembly with a tapped 8-32 hole requiring a stubby-profile detent or positioning element.

Installation Notes

A licensed machinist or qualified assembly technician should install this plunger into a properly tapped 8-32 hole using an appropriate hex key or driver. Verify thread engagement depth against the 0.437-inch thread length before final assembly. If a fixed installation position is required, apply a thread-locking compound before installation. Ensure the plunger nose travel path is clear of obstructions before closing the assembly.