Vlier FRT250P Locking T Handle Plunger 1/4-20 Thread

Product Description

The VLIER FRT250P is a locking T-handle plunger designed for precision indexing and positioning applications in mechanical assemblies. The steel body measures 1 inch in length with a 1/4-20 thread and a 0.8-inch thread engagement length. The plunger projects 0.25 inches from the nose and measures 0.155 inches in diameter. A locking element holds the plunger in the retracted position, allowing hands-free operation during setup or adjustment. Initial end force is 1 pound, with a final end force of 2.5 pounds. Machinists, millwrights, and equipment technicians typically specify this style of plunger for jigs, fixtures, and machine tooling where repeatable positive engagement is required.

The FRT250P is suited for use in light-duty industrial and manufacturing environments where a compact, threaded plunger with a positive locking mechanism is needed. The T-handle format allows manual engagement and retraction without additional tooling. At 1 inch of body length and a 1.13-inch handle length, this plunger fits in tight panel or frame installations. It is installed in tapped 1/4-20 holes in steel or aluminum frames, tooling plates, jig bodies, and similar structural components.

Key Features

• Locking element holds plunger in the retracted position for hands-free operation
• 1/4-20 thread with 0.8-inch thread length for standard tapped-hole installation
• T-handle design allows manual operation without tools, handle length 1.13 inches
• Plunger projection of 0.25 inches with a 0.155-inch plunger diameter
• 1 pound initial end force and 2.5 pounds final end force for light-duty indexing
• Steel body construction for durability in industrial environments

Compatibility

Designed as an OEM-style replacement or direct-install locking T-handle plunger for equipment with standard 1/4-20 tapped mounting holes in jigs, fixtures, tooling plates, and light mechanical assemblies.

Installation Notes

Installation is performed by threading the FRT250P into a tapped 1/4-20 hole by hand or with a wrench applied to the body. Ensure the mating hole is clean and the thread is free of debris before installation. Verify plunger alignment with the indexing hole or detent feature in the mating component before applying final torque to the body. Follow the equipment manufacturer's guidelines for thread engagement depth and locking requirements.