Vlier FRSN375 L Handle Spring Plunger 3/8-16 Steel

Product Description

The VLIER FRSN375 is a non-locking L handle spring plunger designed for industrial positioning, indexing, and locating applications. The plunger uses a spring-loaded mechanism to deliver controlled end force, with an initial end force of 0.25 pounds and a final end force of 1.25 pounds. The body measures 1.13 inches in length with a 3/8-16 thread and a thread length of 0.62 inches. The plunger diameter is 0.25 inches with a projection of 0.3 inches. The L-shaped handle is steel construction, providing a secure grip for manual adjustment without tools in applications where frequent repositioning is required.

This spring plunger is suited for use in machine tool fixtures, jigs, assembly equipment, and precision positioning setups found in manufacturing and industrial maintenance environments. The non-locking design allows the plunger to retract freely under load, making it appropriate for detent, registration, and feed-stop applications. Installation is typically performed by machinists or maintenance technicians threading the body into a tapped bore.

Key Features

• Non-locking plunger design allows free retraction under applied load
• L handle configuration enables tool-free manual adjustment in the field
• Steel handle construction for durability in industrial environments
• 3/8-16 thread with 0.62 inch thread length for standard tapped-bore installation
• Controlled spring force range: 0.25 pounds initial to 1.25 pounds final end force
• Plunger projection of 0.3 inches with 0.25 inch plunger diameter

Compatibility

Designed as a standard-thread spring plunger for use in any application requiring a 3/8-16 tapped bore and a non-locking, L handle actuated detent or positioning element.

Installation Notes

Installation is performed by threading the FRSN375 body into a pre-tapped 3/8-16 bore using the integrated L handle or an appropriately sized hex wrench on the 0.38 inch hex. Ensure the mating bore is clean and free of debris before installation. Do not overtighten; apply only sufficient torque to seat the body securely without distorting the thread. Verify plunger movement is smooth and unobstructed after installation before returning the assembly to service.