Vlier MPRTL12 Locking Knob Handle Plunger M12x1.75

Product Description

The VLIER MPRTL12 is a locking knob handle plunger designed for precise positioning and holding applications in industrial and mechanical assemblies. It features an M12x1.75 thread with a 25mm thread length and a Delrin knob for smooth, hand-operated locking and release. The plunger diameter measures 0.314 inches maximum, with an initial end force of 0.56 pounds building to a final end force of 1.8 pounds. The body measures 1.2 inches in length, making it a compact and reliable choice for jigs, fixtures, and machine tooling installations where controlled hold force is required.

This plunger is suited for use in manufacturing, tooling, and precision mechanical applications where a threaded locking plunger provides repeatable positioning. The Delrin knob allows hand tightening without additional tools, making it practical for frequent adjustment points on fixtures, workholding devices, and indexed assemblies. It is typically installed by machine builders, maintenance technicians, and toolmakers working with modular fixturing or mechanical stops.

Key Features

• M12x1.75 thread form with 25mm thread length for standard metric fastener compatibility
• Locking plunger type with Delrin knob for hand-operated control without tools
• Initial end force of 0.56 pounds and final end force of 1.8 pounds for controlled hold
• Maximum plunger diameter of 0.314 inches with 0.236 inches of plunger projection
• Compact 1.2-inch body length suited for space-constrained fixture assemblies
• Hex size of 0.472 inches for wrench-assisted installation or removal

Compatibility

Designed as an OEM-style replacement or direct-fit component for industrial fixturing, jigs, and positioning assemblies using M12x1.75 threaded plunger mounts.

Installation Notes

Installation is performed by maintenance technicians or machine builders working on mechanical assemblies and fixtures. Power down or de-energize any associated equipment before servicing plunger hardware in powered assemblies. Thread the MPRTL12 into the mating M12x1.75 threaded bore by hand, then use a wrench on the 0.472-inch hex feature to achieve final seating. Do not over-torque the body, as Delrin knob components are not rated for impact tool installation.