Jergens 27270 Threaded Spring Plunger M4 X 0.70 Steel

Product Description

The JERGENS 27270 is a threaded spring plunger designed for indexing, positioning, and light-duty detent applications in mechanical assemblies. It features an M4 x 0.70 thread with a 16 mm thread length and a 1.78 mm maximum plunger diameter, providing a 2.5 mm projection when engaged. The steel body and steel nose deliver consistent performance in general industrial environments. The plunger delivers an initial end force of 0.32 kg and a final end force of 1.04 kg, making it suited for applications requiring controlled, repeatable spring-loaded contact. A 2 mm hex socket allows for straightforward installation with standard tooling.

This spring plunger is used in fixtures, jigs, machine tool components, and production tooling where a small-diameter, light-force detent or positioning element is needed. The compact M4 thread size makes it appropriate for close-tolerance assemblies and thin-wall applications where space is limited. Machinists, tool and die makers, and mechanical assembly technicians typically specify this style of plunger for workholding fixtures and positioning slides in both prototype and production settings.

Key Features

• M4 x 0.70 thread with 16 mm thread length for direct installation into tapped holes
• 1.78 mm maximum plunger diameter with 2.5 mm projection for light detent engagement
• Initial end force of 0.32 kg and final end force of 1.04 kg for controlled spring resistance
• Steel body and steel nose construction for durability in industrial environments
• Black finish for corrosion resistance and reduced surface glare
• 2 mm hex drive for precise installation and torque control with standard hex keys
• No locking element - allows free spring plunger adjustment after installation

Compatibility

Designed as an OEM-style replacement or direct-install threaded spring plunger for mechanical fixtures, jigs, and tooling assemblies that require an M4 x 0.70 threaded detent or positioning element.

Installation Notes

Installation is performed by machinists or mechanical assembly technicians using a 2 mm hex key to thread the plunger into a properly tapped M4 x 0.70 hole. Ensure the mating bore is clean and threads are free of chips or debris before installation. De-energize or lock out any powered equipment before servicing fixtures or assemblies that incorporate this plunger. Do not overtighten, as excessive torque may damage the spring mechanism or strip the threaded bore.