Vlier MPRT12 Knob Handle Spring Plunger M12x1.75

Product Description

The VLIER MPRT12 is a non-locking knob handle spring plunger designed for indexing, positioning, and light-duty retention applications in industrial assemblies. It features an M12x1.75 threaded body with a 25mm thread length and a steel construction with a black finish. The Delrin knob provides a low-profile, hand-operable interface without tools. Initial end force is 0.56 pounds and final end force is 1.8 pounds, making this plunger suited for applications requiring consistent, repeatable spring-loaded engagement. Machinists, fixture builders, and assembly technicians are the typical installers.

The MPRT12 is used in machine tool fixtures, jigs, assembly tooling, and equipment panels where manual positioning or detent action is required. Its threaded body installs into a tapped M12x1.75 hole, and the non-locking design allows the plunger to retract freely under load. Applications are typically light industrial: tooling plates, drawer stops, hinged panel latches, and rotary indexing fixtures. The compact body length of 1.2 inches fits into tight mounting envelopes common in production fixturing.

Key Features

• Non-locking plunger design for free retraction under applied load
• Delrin knob handle allows hand operation without additional tooling
• M12x1.75 thread with 25mm thread length for standard tapped-hole installation
• Spring force range of 0.56 pounds initial to 1.8 pounds final end force
• Steel body with black finish for corrosion resistance and clean appearance
• Hex flats at 0.472 inches across for wrench-assisted installation or torque control

Compatibility

Designed as a direct-install spring plunger for any application with a tapped M12x1.75 hole requiring non-locking, spring-loaded plunger action. No specific OEM system compatibility was provided with this part.

Installation Notes

Installation is performed by threading the MPRT12 into a pre-tapped M12x1.75 hole by hand or with a wrench applied to the 0.472-inch hex flats. Ensure the receiving hole is clean and thread-free of debris before installation. Do not overtighten against soft materials, as the steel body can damage aluminum or plastic fixtures. No special tools or codes are required for standard fixture assembly applications.