Jergens 26925 Threaded Spring Plunger 1/4-28 Steel

Product Description

The JERGENS 26925 is a threaded spring plunger designed for use in positioning, indexing, and latching applications across industrial and mechanical assemblies. It features a 1/4-28 thread size with a 1 inch thread length and a 0.119 inch maximum plunger diameter, delivering a 3/16 inch nose projection. The steel body and steel nose provide durability under repeated cycling. A locking element is included, allowing the plunger to be locked in position once installed. Initial end force is 3 pounds, with a final end force of 13 pounds, making it well suited for light-duty detent and locating work.

This plunger is used in tooling fixtures, jigs, machine bases, and precision assemblies where repeatable positioning is required. The 1/4-28 fine thread allows for controlled installation depth and stable seating in tapped holes. Typical installers include machine builders, tool and die technicians, and maintenance mechanics working on production or fixture hardware. The black finish provides a degree of surface protection in dry or light-duty environments.

Key Features

• 1/4-28 thread with 1 inch thread length for secure installation in standard tapped holes
• 0.119 inch maximum plunger diameter with 3/16 inch projection for precise detent action
• 3 lb initial end force and 13 lb final end force for light-duty positioning and indexing
• Steel body and steel nose construction for durability under repeated use
• Locking element included to secure plunger position after adjustment
• 1/8 inch hex size for installation with a standard hex key

Compatibility

Designed as a standard-thread spring plunger for use in tapped holes accepting a 1/4-28 thread, suitable for tooling fixtures, jigs, and mechanical assemblies requiring a locking-style threaded spring plunger.

Installation Notes

Installation is performed by threading the plunger into a pre-tapped 1/4-28 hole using a 1/8 inch hex key. Ensure the mating assembly is de-energized and stationary before installation or removal. The locking element should be engaged once the desired installation depth is confirmed to prevent the plunger from backing out during operation. Do not overtighten, as this can damage the locking element or restrict plunger travel.