Jergens 27105 Threaded Spring Plunger 5/16-18 Steel

Product Description

The JERGENS 27105 is a short-body threaded spring plunger designed for indexing, positioning, and light holding applications in mechanical assemblies. The plunger features a 5/16-18 thread with a 5/8-inch thread length and a maximum plunger diameter of 0.135 inches, providing a compact footprint suitable for space-constrained installations. An initial end force of 0.5 pounds and a final end force of 4.5 pounds make this unit appropriate for low-to-moderate detent and positioning tasks. The steel body and steel nose offer durability in industrial environments, and the integrated locking element secures the plunger position once installed. Machinists, tool and die makers, and mechanical assembly technicians are the primary installers.

This spring plunger is suited for use in jigs, fixtures, machine tool components, and light industrial equipment where repeatable positioning or part retention is required. The short plunger length type and 3/16-inch projection make it well matched to shallow-bore or thin-panel applications where a standard-length plunger would not fit. The black finish provides a degree of corrosion resistance for general shop and production environments.

Key Features

• 5/16-18 thread size with 5/8-inch thread length for secure installation in threaded bores
• Maximum plunger diameter of 0.135 inches with 3/16-inch projection for compact detent engagement
• 0.5 pound initial end force and 4.5 pound final end force for light indexing and positioning duty
• Steel body and steel nose for durability in industrial and tooling applications
• Integrated locking element prevents plunger from backing out after installation
• Black finish for general corrosion resistance in shop environments

Compatibility

Designed as a standard 5/16-18 threaded spring plunger for use in jigs, fixtures, and mechanical assemblies requiring a short-body, low-projection detent or positioning element.

Installation Notes

Installation requires a properly tapped 5/16-18 threaded bore in the mating component. Use an appropriate hex key or installation tool on the locking element to secure the plunger to the specified torque recommended in the assembly drawing. Ensure the bore depth and clearance accommodate the 3/16-inch plunger projection before final assembly. Do not exceed the rated end force range by substituting incompatible spring plungers in the same bore.