Gibraltar 34258 Non-locking Plunger 1/4-20 Steel

Product Description

The GIBRALTAR 34258 is a non-locking spring plunger with a threaded stud body, designed for indexing, positioning, and light-duty locking applications in industrial and mechanical assemblies. The plunger features a 1/4-20 thread size with a 0.5 inch thread length and a knobless threaded stud head style for flush or recessed mounting configurations. The steel construction with zinc-plated finish provides corrosion resistance in general shop and mechanical environments. Initial end force is 0.5 pounds, with a final end force of 2.5 pounds, making it suitable for light-duty detent and positioning work. A locking element is included. Installed by machinists, toolmakers, and mechanical assemblers.

The 34258 is used in jigs, fixtures, tooling plates, and general mechanical assemblies where repeatable part positioning or light detent action is required. The knobless threaded stud style allows the plunger to be installed flush into tapped holes without a protruding knob, making it appropriate for low-clearance applications. The 1/4-20 thread is a common tap size found across standard tooling and fixture work in manufacturing and industrial settings.

Key Features

• Non-locking plunger type for smooth, repeatable positioning action
• 1/4-20 thread size with 0.5 inch thread length for standard tapped hole installation
• Knobless threaded stud head style suits low-clearance and flush-mount applications
• Steel body with zinc-plated finish for corrosion resistance in general service environments
• Initial end force 0.5 pounds, final end force 2.5 pounds for light-duty detent applications
• Locking element included for secure installation in threaded bore

Compatibility

Designed as a standard 1/4-20 threaded spring plunger for use in industrial jigs, fixtures, tooling plates, and mechanical assemblies requiring light-duty indexing or detent positioning.

Installation Notes

Installation requires a tapped 1/4-20 hole in the receiving component. Thread the plunger body in using appropriate tooling on the stud flats; do not overtighten, as this is a precision-tolerance component. Ensure the plunger bore is clear of debris before installation so the plunger moves freely through its full stroke. This type of component is typically installed by machinists or toolmakers during fixture assembly or maintenance.