Vlier S54 Threaded Spring Plunger 1/4-20 1in Thread

Product Description

The VLIER S54 is a standard threaded spring plunger designed to provide controlled, spring-loaded positioning and indexing force in mechanical assemblies. It features a 1/4-20 thread with a 1 inch thread length and a 3/16 inch plunger projection. The steel body and steel nose deliver consistent durability in industrial and trade applications. Initial end force is 3 pounds and final end force is 13 pounds, making the S54 suitable for light-duty detent and positioning tasks. Machinists, tool and die technicians, and mechanical assembly professionals typically specify and install this component.

The S54 is used in jigs, fixtures, tooling plates, and mechanical assemblies where repeatable spring-loaded indexing or detent positioning is required. The 1/4-20 thread allows installation into standard tapped holes. Its compact plunger diameter of 0.118 inches and 3/16 inch projection suit applications with limited clearance. This plunger is appropriate for both light production tooling and maintenance repair scenarios in manufacturing and industrial environments.

Key Features

• 1/4-20 thread with 1 inch thread length for standard tapped-hole installation
• 3/16 inch plunger projection with standard plunger length type
• 3 pound initial end force and 13 pound final end force for light-duty detent applications
• Steel body and steel nose construction for durability in industrial use
• Plunger diameter range 0.117 to 0.118 inches for precise fitment
• No locking element - free-spinning installation for straightforward positioning

Compatibility

Designed as an OEM-style threaded spring plunger for use in standard 1/4-20 tapped holes in jigs, fixtures, tooling plates, and mechanical positioning assemblies.

Installation Notes

Installation is performed by threading the S54 into a pre-tapped 1/4-20 hole using a hex key or slotted driver, depending on the drive style of the plunger body. Ensure the mating bore is clean and free of chips or debris before installation. De-energize or lock out any machinery before servicing assemblies that contain spring plungers. Do not overtighten, as this can compress the spring beyond its rated travel and reduce functional end force.