Jergens 27170 Threaded Spring Plunger M4 X 0.7

Product Description

The JERGENS 27170 is a short-body threaded spring plunger designed for indexing, positioning, and light-duty detent applications in industrial assemblies. It features an M4 x 0.7 thread with a 13 mm thread length and a maximum plunger diameter of 1.78 mm. The plunger projects 2.5 mm and delivers an initial end force of 0.23 kg rising to a final end force of 0.91 kg, making it suited for applications requiring repeatable, low-force ball or pin detent action. Both the body and nose are steel construction with a black finish. A locking element is included to secure the plunger in position after installation. Machinists, toolmakers, and fixture builders are the typical installers.

This spring plunger is used in jigs, fixtures, machine tool components, and precision assemblies where a compact M4-threaded detent point is needed. The short body length of 13 mm suits confined mounting spaces in tooling plates, workholding fixtures, and light mechanical assemblies. The locking element allows the installer to lock the plunger at the desired engagement depth once the correct force setting is dialed in.

Key Features

• M4 x 0.7 thread with 13 mm thread length fits standard metric tapped holes
• Short plunger length type for compact or space-restricted fixture applications
• Steel body and nose construction for durability in tooling environments
• Black finish for corrosion resistance and identification
• Locking element included to fix plunger depth after adjustment
• Low end-force range (0.23 kg initial to 0.91 kg final) suits light detent and indexing duties

Compatibility

Designed as an OEM-style replacement or direct-fit component for metric-threaded jigs, fixtures, and tooling assemblies requiring an M4 x 0.7 short-body spring plunger with a locking element.

Installation Notes

Installation requires a properly tapped M4 x 0.7 through or blind hole with sufficient depth to accept the 13 mm thread length. Use the appropriate hex key or spanner to thread the plunger in and engage the locking element once the desired projection depth is set. Ensure the mating assembly is de-energized or secured before adjusting plunger position in active tooling. Do not exceed the rated end force range by over-compressing the plunger nose during assembly.