Vlier FR500 Locking L Handle Spring Plunger 1/2-13

Product Description

The VLIER FR500 is a locking L handle spring plunger designed for indexing, positioning, and holding applications in industrial and mechanical assemblies. Threaded at 1/2-13, it delivers an initial end force of 1 pound rising to a final end force of 5 pounds, giving technicians predictable spring resistance across the plunger stroke. The steel construction provides durability in demanding environments. With a body length of 2.11 inches and a plunger diameter of 0.31 inches, the FR500 fits standard plunger-threaded bores and installs without special tooling. The locking L handle allows the plunger to be retracted and locked in the withdrawn position, simplifying loading and alignment tasks.

The FR500 is suited for use in jigs, fixtures, machine tool components, and production equipment where repeatable positive stops or detent positioning are required. It is appropriate for both light-duty and moderate-force indexing tasks in manufacturing and assembly environments. Maintenance technicians and machine builders working with threaded plunger assemblies will find this a direct-fit replacement or upgrade for existing 1/2-13 spring plunger locations.

Key Features

• Locking L handle retracts and holds the plunger in the withdrawn position for tool-free loading
• 1/2-13 thread size for compatibility with standard threaded plunger bores
• Initial end force of 1 pound rising to final end force of 5 pounds for consistent indexing resistance
• Plunger projection of 0.75 inches provides adequate engagement depth for most detent applications
• Steel handle and body construction for long service life in industrial environments
• Thread length of 1.1 inches and hex size of 0.5 inches allow for secure installation and adjustment

Compatibility

Designed as an OEM-style replacement or direct installation component for machinery, fixtures, and assemblies using 1/2-13 threaded spring plunger bores.

Installation Notes

Installation of spring plungers is typically performed by maintenance technicians or machine builders using standard hex wrenches. Ensure the mating bore is clean and properly tapped to 1/2-13 before threading in the plunger. Avoid over-torquing the body, which can distort the thread or affect plunger travel. Verify plunger projection and spring force requirements match the application before final installation.