Vlier H61 Threaded Spring Plunger 1/2-13 Steel Body

Product Description

The VLIER H61 is a standard threaded spring plunger designed to provide controlled, repeatable positioning force in mechanical assemblies. The plunger features a 1/2-13 thread size with a 1-1/4 inch thread length and delivers an initial end force of 2.7 pounds, a middle end force of 6.0 pounds, and a final end force of 9.3 pounds. The body and nose are both constructed from steel, making it suitable for durable, high-cycle industrial and mechanical applications. Machinists, tool-and-die technicians, and mechanical assemblers install this type of component in fixtures, jigs, tooling plates, and precision assemblies requiring repeatable detent or retention action.

This plunger is used in applications where a spring-loaded nose must engage a recess or detent to hold a part, panel, or subassembly in a specific position. Typical installations include machining fixtures, assembly jigs, indexing mechanisms, and sliding or rotating machine components. The 1/4 inch projection provides moderate nose travel, and the absence of a locking element allows straightforward installation and removal. The 1/4 inch hex size allows for installation with a standard hex key or driver without needing access to the full body exterior.

Key Features

• Standard plunger length type with 1-1/4 inch body length and 1-1/4 inch thread length
• 1/2-13 unified coarse thread for compatibility with standard tapped holes
• 1/4 inch nose projection suitable for moderate detent and retention applications
• Steel body and steel nose for strength and durability in industrial environments
• Progressive spring force: 2.7 pounds initial, 6.0 pounds middle, 9.3 pounds final end force
• 1/4 inch hex drive size for easy installation with a hex key

Compatibility

Designed as a standard threaded spring plunger for use in any application requiring a 1/2-13 tapped hole and a steel-body detent or positioning plunger with 1/4 inch projection.

Installation Notes

Installation is performed by threading the H61 into a properly tapped 1/2-13 hole using a 1/4 inch hex key. Ensure the mating hole is clean and free of debris before installation. Disengage or de-energize any moving machinery before servicing fixtures or assemblies that contain spring plungers. Do not exceed the rated final end force when preloading the plunger nose during installation.