Jergens 26873 Threaded Spring Plunger M8 X 1.25

Product Description

The JERGENS 26873 is a threaded spring plunger designed for indexing, positioning, and light-duty detent applications in industrial assemblies. The plunger features an M8 x 1.25 thread with a 25 mm thread length and a steel body with a black finish, providing corrosion resistance and durability in shop environments. The plunger nose measures 3.43 mm in diameter with a 5 mm projection, delivering an initial end force of 1.35 kg and a final end force of 6.75 kg. Installation and adjustment require a 4 mm hex key. This part is typically installed by machinists, toolmakers, or maintenance technicians working on fixtures, jigs, and automation tooling.

This spring plunger is suited for use in machine fixtures, assembly jigs, tooling plates, and light-duty positioning mechanisms across manufacturing and industrial maintenance applications. It is threaded directly into tapped holes and functions without a separate locking element, making it appropriate for locations where removal and repositioning are expected during normal operation.

Key Features

• M8 x 1.25 thread size with 25 mm thread length for secure installation in standard tapped holes
• 3.43 mm diameter steel nose with 5 mm plunger projection for precise detent engagement
• Initial end force of 1.35 kg and final end force of 6.75 kg for controlled indexing feel
• Steel body and nose construction with black finish for durability in industrial environments
• 4 mm hex drive for easy installation and torque adjustment with a standard hex key
• No locking element, allowing straightforward removal and repositioning

Compatibility

Designed as a direct-fit threaded spring plunger for any application with a standard M8 x 1.25 tapped hole requiring a light-duty spring-loaded positioning or detent element.

Installation Notes

Installation is performed by threading the plunger into a pre-tapped M8 x 1.25 hole using a 4 mm hex key. Ensure the mating hole is clean and free of chips or debris before threading in the plunger to avoid thread damage. Do not overtighten, as excess torque can compress the internal spring beyond its rated travel and reduce plunger function. Always verify plunger projection and force specifications match the application requirements before final assembly.