Jergens 27004 Threaded Spring Plunger 1/4-20 Steel

Product Description

The JERGENS 27004 is a short-body threaded spring plunger designed to provide controlled, repeatable positioning force in light-duty mechanical assemblies. It features a 1/4-20 thread and a 5/8-inch thread length, making it straightforward to install in pre-tapped housings. The plunger nose and body are both steel construction with a black finish. Initial end force is 0.3 pounds and final end force is 3.5 pounds, giving the plunger a firm seat when fully engaged. The 3/16-inch projection keeps the nose profile low. Machinists, tool-and-die makers, and assembly technicians working on jigs, fixtures, and indexing mechanisms are the primary installers of this type of hardware.

This spring plunger is suited for use in machine tool fixtures, assembly jigs, stamping dies, and general industrial positioning applications where repeatable detent action is needed. The short body length of 5/8 inch fits installations with limited axial depth. The 0.119-inch maximum plunger diameter accommodates tight-clearance bores. No locking element is present, so the plunger threads directly into a tapped bore without a secondary jam-nut feature. Typical applications include panel alignment pins, drawer indexing, and light-duty retaining functions in both OEM equipment and custom tooling builds.

Key Features

• 1/4-20 thread size with 5/8-inch thread length for standard tapped-hole installation
• Short body profile at 5/8 inch suits depth-restricted mounting bores
• 0.3-pound initial end force and 3.5-pound final end force for positive detent engagement
• Steel body and steel nose with black finish for durability in industrial environments
• 3/16-inch plunger projection maintains a low nose extension when engaged
• No locking element - simple threaded installation into a pre-tapped hole

Compatibility

Designed as an OEM-style replacement or direct installation component for machine fixtures, assembly jigs, and industrial tooling assemblies requiring a short-body 1/4-20 threaded spring plunger with steel construction.

Installation Notes

Installation is performed by machinists or assembly technicians using a standard hex key or screwdriver slot appropriate to the plunger head style. Thread the plunger into a clean, properly tapped 1/4-20 hole, ensuring the bore depth accommodates the full body length before torquing to the fixture specification. De-energize or lock out any machinery before servicing fixtures or jigs that contain this plunger. Do not overtighten - steel threads in softer housing materials can strip if excessive force is applied.