Vlier SPRM12 Locking Pull Ring Plunger M12x1.75

Product Description

The VLIER SPRM12 is a stainless steel locking pull ring plunger with an M12x1.75 thread form and a 1.4-inch thread length. The plunger measures 8mm in diameter with a 12.7mm projection and a full plunger length of 2.0 inches. End force ranges from 11 N initial to 22 N final, providing controlled, repeatable indexing resistance. The pull ring locking mechanism prevents inadvertent engagement or disengagement during operation. This type of component is installed by mechanical technicians, toolmakers, and maintenance professionals in precision positioning and assembly fixture applications.

The SPRM12 is suited for industrial fixtures, jigs, machine tool assemblies, and positioning mechanisms where a threaded body plunger is required to hold or locate a component under load. The locking pull ring design is appropriate in applications where vibration or incidental contact could otherwise cause unintended plunger retraction. The stainless steel construction makes it suitable for environments with moisture exposure or mild corrosive conditions. The 25mm ring diameter provides adequate clearance for gloved-hand operation in production settings.

Key Features

• M12x1.75 threaded body with 1.4-inch thread engagement length
• Locking pull ring prevents unintended plunger retraction
• 8mm plunger diameter with 12.7mm projection and 2.0-inch plunger length
• End force range: 11 N initial to 22 N final for consistent indexing force
• Stainless steel construction for corrosion resistance in demanding environments
• 25mm ring diameter supports easy manual actuation

Compatibility

Designed as an OEM-style replacement or direct-install component for industrial fixtures, jigs, and positioning assemblies requiring an M12x1.75 threaded locking plunger.

Installation Notes

Installation is performed by mechanical technicians or toolmakers using standard threading tools compatible with M12x1.75 thread specifications. Ensure the receiving bore and thread are clean and free of debris before threading the plunger body in place. Apply appropriate thread-locking compound or torque per the assembly drawing requirements for the host fixture. Confirm the pull ring moves freely and the plunger locks and releases without binding after installation.