Jergens 27326 Threaded Spring Plunger 5/16-18 Steel

Product Description

The JERGENS 27326 is a threaded spring plunger designed to provide controlled, repeatable indexing and positioning force in mechanical assemblies. It features a 5/16-18 threaded body with a 1 inch thread length, a steel nose, and a steel body finished in black. The plunger nose diameter measures 0.135 inches with a 3/16 inch projection. A built-in locking element secures the plunger in place after installation, preventing loosening from vibration. Initial end force is 1.5 pounds, with a final end force of 4.5 pounds, making it suitable for light-duty detent and positioning applications. Licensed machinists, millwrights, and maintenance mechanics are the typical installers.

This spring plunger is used in fixtures, jigs, machine tool components, and industrial equipment where consistent detent action or positive stop positioning is required. The standard-length plunger body suits panel assemblies, slide mechanisms, and tooling plates where a 5/16-18 tapped hole is already present or can be added. It is suited for both OEM production builds and field maintenance replacements in light industrial and manufacturing environments.

Key Features

• 5/16-18 thread size with 1 inch thread length for secure installation in standard tapped holes
• Steel body and steel nose for durability in industrial applications
• Black finish for corrosion resistance and clean appearance
• Locking element prevents plunger from backing out due to vibration
• 1.5 pound initial end force and 4.5 pound final end force for predictable detent performance
• 5/32 inch hex size for easy installation and removal with a standard hex key

Compatibility

Designed as a direct-fit replacement or OEM-style spring plunger for mechanical assemblies, fixtures, and tooling components using a standard 5/16-18 tapped hole with a minimum thread engagement depth of 1 inch.

Installation Notes

Installation requires a 5/16-18 tapped hole and a 5/32 inch hex key. Thread the plunger in by hand first to confirm alignment, then tighten using the hex drive to seat the locking element. De-energize or lock out any machine prior to installing or replacing spring plungers in powered equipment. Do not overtighten, as doing so may damage the locking element or distort the plunger body.