Vlier SSM57 Threaded Spring Plunger 5/16-18 Stainless

Product Description

The VLIER SSM57 is a stubby threaded spring plunger designed for applications requiring high end force in restricted or tight-clearance spaces. The stainless steel body and nose provide corrosion resistance and durability in demanding environments. Threaded at 5/16-18 with a body and thread length of 0.562 inches, this plunger delivers an initial end force of 1.25 pounds and a final end force of 4 pounds. The maximum plunger diameter is 0.135 inches with a projection of 0.084 inches, making it well suited for compact assemblies where standard-length plungers will not fit. Mechanical assemblers and precision equipment technicians are the primary installers of this component.

The SSM57 is intended for use in industrial and mechanical assemblies where positive spring-loaded positioning, detenting, or locking is needed in a confined space. Its stubby form factor allows installation in recessed bores or threaded holes with minimal surrounding clearance. The high final end force of 4 pounds makes it appropriate for applications that require firm, consistent plunger engagement, such as tooling fixtures, indexing mechanisms, or positioning assemblies where repeatable spring-loaded contact is critical.

Key Features

• Stubby plunger length type for use in restricted spaces with limited depth clearance
• Stainless steel body and nose material for corrosion resistance and long service life
• 5/16-18 thread for easy installation into standard threaded holes
• Initial end force of 1.25 pounds and final end force of 4 pounds for high-force detent applications
• Plunger projection of 0.084 inches and maximum plunger diameter of 0.135 inches for compact fitment
• No locking element, allowing straightforward threaded installation and removal

Compatibility

Designed as an OEM-style threaded spring plunger for high end force and restricted space applications requiring a 5/16-18 threaded body with a stubby profile.

Installation Notes

Installation is performed by mechanical assemblers or maintenance technicians using standard hand tools suitable for a 5/16-18 threaded fastener. Ensure the receiving threaded hole is clean and free of debris before installation. De-energize or power down any associated equipment before servicing components in the assembly. Do not overtighten, as this may damage the plunger mechanism or thread engagement.