Vlier H56N Threaded Spring Plunger 5/16-18 Steel Locking

Product Description

The VLIER H56N is a threaded spring plunger designed for positioning, indexing, and light-duty detent applications in mechanical assemblies. It features a 5/16-18 thread with a 1 inch thread length and a 3/16 inch nose projection. The steel body and steel nose provide durability in industrial and manufacturing environments. An integrated locking element secures the plunger in position after installation, preventing loosening from vibration. Initial end force is 3 pounds, with a final end force of 15 pounds, giving technicians a defined force range for controlled engagement. This type of component is typically installed by mechanical assemblers, maintenance technicians, and machine builders.

The H56N is suited for use in jigs, fixtures, machine tooling, and precision assemblies where repeatable positioning or detent action is required. The standard plunger length type and compact 1 inch body length make it appropriate for confined mounting locations. It is commonly used in both light manufacturing and industrial equipment maintenance applications where a reliable, tool-installed spring plunger is needed.

Key Features

• 5/16-18 thread size with 1 inch thread length for standard tapped-hole installation
• 3/16 inch nose projection for controlled detent engagement depth
• Locking element prevents backing out under vibration or repeated cycling
• Steel body and steel nose for strength in industrial environments
• 3 pound initial end force and 15 pound final end force for defined engagement range
• 1/8 inch hex drive for installation and torque adjustment with standard hex key

Compatibility

Designed as a standard threaded spring plunger for use in any tapped 5/16-18 hole, suitable for jigs, fixtures, tooling plates, and general mechanical assemblies requiring detent or positioning action.

Installation Notes

Installation is performed by threading the plunger into a pre-tapped 5/16-18 hole using a 1/8 inch hex key. Disengage or de-energize any powered or moving equipment before servicing assemblies that contain spring plungers. The locking element should be engaged after the plunger is positioned at the desired depth to prevent migration. Do not overtighten, as this can deform the locking element or alter the spring force characteristics.