Vlier PRM6 Locking Pull Ring Plunger M6x1.0 Steel

Product Description

The VLIER PRM6 is a steel locking pull ring plunger designed for precision indexing, positioning, and holding applications in mechanical assemblies. Threaded M6x1.0 with a 0.8 inch thread length, the PRM6 installs into a tapped bore and uses a retractable spring-loaded plunger with a pull ring to release or lock the plunger position manually. The plunger diameter is 4 mm with a 6.4 mm projection, and the spring delivers an initial end force of 4.4 N rising to a final end force of 11 N. Machinists, toolmakers, and maintenance technicians working with jigs, fixtures, and machine tool assemblies install this type of component.

The PRM6 is suited for light-duty positioning tasks in production fixtures, jigs, tooling plates, and mechanical indexing devices where a manually retractable plunger is needed. The pull ring allows the operator to retract the plunger without tooling, making it practical for repetitive positioning cycles. The M6x1.0 thread size fits standard metric tapped bores commonly found in industrial machinery and fabricated fixture plates. This plunger is appropriate for both original equipment and aftermarket fixture builds in manufacturing and maintenance environments.

Key Features

• M6x1.0 thread with 0.8 inch (20.32 mm) thread length for standard metric installation
• 4 mm plunger diameter with 6.4 mm plunger projection
• Spring end force range: 4.4 N initial to 11 N final for light-duty holding force
• Pull ring locking mechanism allows tool-free manual plunger retraction
• Steel construction for durability in industrial fixture and tooling applications
• Compact body length of 29 mm with a 16 mm ring diameter

Compatibility

Designed as an OEM-style replacement or direct-fit component for metric M6x1.0 tapped bores in industrial jigs, fixtures, tooling plates, and mechanical indexing assemblies.

Installation Notes

Installation requires a properly tapped M6x1.0 through or blind bore of adequate depth to accept the 20.3 mm length under head. Thread the plunger in by hand to start, then tighten with an appropriate wrench or spanner to secure without over-torquing the body. Ensure the mating bore or detent receiving the plunger tip is aligned to the plunger centerline before final assembly. Verify the pull ring moves freely and the plunger retracts and extends without binding after installation.