Jergens 26705 Threaded Spring Plunger 5/16-18 Steel

Product Description

The JERGENS 26705 is a short-body threaded spring plunger designed for indexing, positioning, and light-duty detent applications in mechanical assemblies. It features a 5/16-18 thread with a 5/8 inch thread length and a maximum plunger diameter of 0.135 inches. The nose and body are both steel with a black finish, and the unit includes a locking element to secure the plunger in the threaded bore after installation. Initial end force is 0.5 pounds, and final end force is 10 pounds, making it suitable for applications requiring a firm, audible detent feel. Machinists, toolmakers, and mechanical assemblers install this type of component in jigs, fixtures, and production tooling.

This spring plunger is used in industrial and manufacturing environments where repeatable positioning or light retention is required. Typical applications include fixture stops, drawer detents, panel locators, and tooling plates. The 3/16 inch plunger projection allows for positive engagement without excessive travel. The short body profile suits installations where axial space behind the mounting surface is limited. It is installed by threading directly into a tapped hole in the host component.

Key Features

• 5/16-18 thread size with 5/8 inch thread length for standard tapped-hole installation
• Maximum plunger diameter of 0.135 inches with 3/16 inch projection
• 0.5 pound initial end force and 10 pound final end force for firm detent engagement
• Steel body and steel nose construction with black finish for durability
• Integrated locking element locks plunger position in the bore after adjustment
• Short plunger length type suits space-constrained fixture and tooling applications

Compatibility

Designed as a standard threaded spring plunger for use in any application requiring a 5/16-18 tapped hole and a short-body plunger with a 5/8 inch thread length.

Installation Notes

Installation is performed by threading the plunger body into a pre-tapped 5/16-18 hole using an appropriate hex key or spanner tool. Ensure the mating bore is clean and free of chips before threading in the component. The locking element should be engaged after the plunger is set to the desired depth to prevent back-out under vibration. Do not over-torque the body, as this can damage the locking element or deform the bore thread.