Vlier H58 Threaded Spring Plunger 3/8-16 Steel Body

Product Description

The VLIER H58 is a standard threaded spring plunger designed for positive positioning, detenting, and indexing applications in mechanical assemblies. The H58 features a 3/8-16 thread and a 1-1/8 inch thread length, making it suitable for installation into tapped holes in machine components, fixtures, and tooling. The steel body and steel nose deliver durability under repeated cycling loads. With an initial end force of 5.5 pounds and a final end force of 14.5 pounds, the H58 provides controlled, repeatable holding force across its 3/16 inch projection. Machinists, toolmakers, and mechanical maintenance technicians are the primary installers of this component.

The VLIER H58 is used in industrial machinery, production fixtures, jigs, and mechanical assemblies where a spring-loaded plunger is needed to index or retain a sliding or rotating component. The 3/8-16 thread size fits standard tapped holes in steel, aluminum, and cast iron assemblies. This plunger type appears in light to medium-duty detent applications across manufacturing, automation, and precision tooling environments. The standard plunger length type indicates a conventional body profile suited to general-purpose installations without special clearance requirements.

Key Features

• 3/8-16 thread with 1-1/8 inch thread length for installation into standard tapped holes
• 3/16 inch plunger projection provides consistent indexing and detent travel
• 5.5 pound initial end force and 14.5 pound final end force for reliable holding force
• Middle end force of 10.0 pounds for predictable force progression through stroke
• Steel body and steel nose construction for durability in industrial environments
• No locking element - standard thread installation without thread-lock features

Compatibility

Designed for use in any assembly accepting a 3/8-16 threaded spring plunger with a 1-1/8 inch thread length and standard body profile.

Installation Notes

Installation requires a properly tapped through or blind hole sized for 3/8-16 thread. Use a hex wrench sized for the 3/16 inch hex to drive the plunger body to the appropriate depth without overdriving. Confirm thread engagement depth meets the design requirement before applying load. Ensure mating surfaces are clean and free of chips or burrs that could affect plunger projection and force consistency.