Vlier S61N Threaded Spring Plunger 1/2-13 Steel Locking

Product Description

The VLIER S61N is a threaded spring plunger designed for indexing, positioning, and light-duty locking applications in industrial and mechanical assemblies. It features a 1/2-13 thread with a 1-1/4 inch thread length and a steel body rated for both initial and final end forces. The plunger nose diameter ranges from 0.247 to 0.248 inches with a 1/4 inch projection. A built-in locking element prevents the plunger from backing out under vibration or repeated cycling, making it suitable for demanding production and maintenance environments. Machinists, tool and die technicians, and mechanical assemblers are the primary installers.

The S61N is used in fixtures, jigs, machine tool components, and assembly equipment where repeatable positioning or detent action is required. The standard plunger length type and 1-1/4 inch body length make it a straightforward fit in drilled and tapped housings. The steel body and steel nose material suit applications involving moderate loads and metal-on-metal contact. It is appropriate for both light industrial production fixtures and field maintenance assemblies where a threaded retention point is needed.

Key Features

• 1/2-13 thread size with 1-1/4 inch thread length for standard tapped-hole installation
• Plunger projection of 1/4 inch for controlled detent engagement depth
• Initial end force of 2.7 pounds and final end force of 9.3 pounds for defined spring resistance
• Plunger diameter range of 0.247 to 0.248 inches for precise fitment
• Locking element prevents plunger from backing out under vibration or repeated use
• Steel body and steel nose for durability in metal contact applications

Compatibility

Designed for installation in any drilled and tapped housing accepting a 1/2-13 thread. Suitable as an OEM-style or replacement spring plunger in industrial fixtures, jigs, and mechanical assemblies requiring standard plunger length configuration.

Installation Notes

Installation is performed by threading the S61N into a properly tapped 1/2-13 hole using an appropriate hex key or spanner tool. Ensure the mating bore is clean and free of debris before installation. De-energize or lock out any machinery before servicing or replacing spring plungers in powered fixtures. Do not exceed the rated end force by over-compressing the plunger during assembly.