Vlier SSM56 Threaded Spring Plunger 5/16-18 Stainless Steel

Product Description

The VLIER SSM56 is a stubby threaded spring plunger designed for precision positioning, indexing, and light-duty detent applications where restricted space limits the use of standard-length plungers. Machined from stainless steel throughout - body and nose - the SSM56 threads into a tapped 5/16-18 hole with a 0.562 inch thread length. The plunger nose projects 0.084 inches at full engagement and delivers a final end force of 15.5 pounds, making it suitable for high end force applications in compact assemblies. Mechanical and industrial technicians install this type of component in jigs, fixtures, tooling plates, and precision machinery where controlled spring-loaded positioning is required.

The SSM56 is intended for applications where axial space is constrained and a standard-length plunger body cannot be accommodated. Its stubby profile keeps the installed length minimal while maintaining a high final end force of 15.5 pounds, which provides firm, reliable detent action. Typical install scenarios include fixturing on CNC machines, assembly tooling, and industrial equipment requiring repeatable part location or panel retention in tight quarters.

Key Features

• Stubby plunger length type for use in restricted-space installations
• 5/16-18 thread for straightforward installation into standard tapped holes
• Stainless steel body and nose for corrosion resistance in demanding environments
• 3.75 pound initial end force transitioning to 15.5 pound final end force
• 0.084 inch plunger projection at full engagement
• No locking element, allowing repositioning and removal without thread-locking compounds

Compatibility

Designed for use in any application requiring a 5/16-18 threaded spring plunger with a stubby body profile, particularly in high end force and restricted-space scenarios common to industrial tooling, fixture plates, and precision assembly equipment.

Installation Notes

Installation is performed by mechanical or industrial maintenance technicians using standard hand tools. The mating tapped hole must be clean and correctly sized to 5/16-18 before threading in the plunger. De-energize or lock out any machine before servicing components in the assembly. Avoid overtightening, as excessive torque can damage the plunger body or distort the spring mechanism.