Jergens 26604 Threaded Spring Plunger 1/4-20 Steel

Product Description

The JERGENS 26604 is a short-style threaded spring plunger designed for indexing, positioning, and light-duty locating applications in industrial tooling and fixture assemblies. It features a 1/4-20 thread with a 5/8-inch thread length and a maximum plunger diameter of 0.119 inches. The steel body and steel nose provide durability in machine shop and production environments. With an initial end force of 0.5 pounds and a final end force of 6 pounds, this plunger delivers controlled resistance suitable for repeatable positioning tasks. A black finish completes the assembly. Installation requires only standard hand tools and a tapped hole.

This spring plunger is used in jigs, fixtures, workholding devices, and tooling plates where a threaded, spring-loaded locating element is needed. The short plunger style suits installations with limited travel space. The 3/16-inch projection keeps the nose engagement shallow, making it appropriate for light indexing points in precision fixture work. Machinists, toolmakers, and fixture builders are the primary installers of this component in both production and prototype environments.

Key Features

• 1/4-20 thread size with 5/8-inch thread length for standard tapped-hole installation
• Short plunger length type with 3/16-inch projection for low-profile engagement
• Steel body and steel nose for wear resistance in industrial tooling applications
• 0.5-pound initial end force and 6-pound final end force for controlled spring resistance
• No locking element, allowing free plunger travel without mechanical lock
• Black finish for corrosion resistance and professional appearance

Compatibility

Designed as a standard threaded spring plunger for use in industrial jigs, fixtures, and tooling plates with a tapped 1/4-20 hole and sufficient body clearance for a 5/8-inch body length.

Installation Notes

Installation is performed by toolmakers or machinists using a hex key or spanner tool appropriate for the plunger body style. The mating hole must be tapped to 1/4-20 before installation. Ensure the tapped hole depth accommodates the 5/8-inch thread length without bottoming out the plunger body. Thread engagement should be confirmed secure before placing the fixture into service.