Vlier MPRTL12P Locking Knob Handle Plunger M12x1.75

Product Description

The VLIER MPRTL12P is a locking knob handle plunger designed for precision positioning and retention applications in industrial and mechanical assemblies. Built with a steel body and a Delrin knob, this spring-loaded plunger uses an M12x1.75 thread and delivers an initial end force of 0.56 pounds (2.5 N) ramping to a final end force of 1.8 pounds (8 N). The locking mechanism holds the plunger in the retracted position, preventing unintended extension during machine setup or part loading. The body measures 1.2 inches in length with a plunger projection of 0.236 inches and a maximum plunger diameter of 0.314 inches. Installation is straightforward for machine builders, tooling engineers, and maintenance technicians working with fixtures, jigs, and indexing equipment.

The MPRTL12P suits applications where positive plunger lockout is required, such as fixture plates, assembly jigs, machine guarding panels, and indexing tables. The 25mm thread length and M12x1.75 thread size allow installation into standard metric-tapped holes common in industrial tooling. The Delrin knob provides a comfortable, low-torque grip for manual operation without tools. This plunger is appropriate for light-to-medium retention force requirements in both OEM equipment builds and field maintenance situations where repeatable positioning is critical.

Key Features

• Locking plunger design holds retracted position to prevent unintended extension
• M12x1.75 thread with 25mm thread length for direct installation into metric-tapped bores
• Initial end force of 0.56 pounds (2.5 N) and final end force of 1.8 pounds (8 N)
• Delrin knob provides manual operation without additional tooling
• Steel body construction for durability in industrial environments
• Maximum plunger diameter of 0.314 inches with a projection of 0.236 inches

Compatibility

Designed as an OEM-style replacement or direct-fit component for industrial fixtures, jigs, and indexing assemblies requiring an M12x1.75 locking knob handle plunger.

Installation Notes

Installation is performed by machine builders or maintenance technicians using standard metric hand tools. Thread the plunger into a clean, properly tapped M12x1.75 hole and torque using the 0.472 inch hex drive on the body. Ensure the mating bore depth accommodates the 1.2 inch body length and 0.98 inch length under head. Power down or de-energize any associated equipment before installing or servicing plungers in active assemblies.