Gibraltar 34250 Non-locking Knob Plunger 1/4-20 Threaded Stud

Product Description

The GIBRALTAR 34250 is a non-locking spring plunger with a threaded stud body, designed for indexing, positioning, and light-duty holding applications in mechanical assemblies. It features a 1/4-20 thread size with a 0.5-inch thread length, a maximum plunger diameter of 0.144 inches, and a spring force range of 1 pound initial end force to 5 pounds final end force. The knobless threaded stud design allows the plunger to be installed flush or recessed into a tapped bore, making it suitable for applications where a low-profile installation is required. Technicians and machinists working on fixtures, jigs, or precision assemblies will find this part a direct-fit solution for controlled plunger engagement.

This plunger is used in light industrial and mechanical assembly environments where repeatable positioning or detent action is needed without a locking mechanism. The threaded stud configuration suits applications where the plunger body is threaded into a panel, bracket, or fixture housing. The compact body length of 0.625 inches and plunger projection of 0.125 inches make it appropriate for space-constrained installations. It is typically installed by maintenance technicians, tool and die professionals, or mechanical assemblers working with fixtures, tooling plates, or enclosure hardware.

Key Features

• Non-locking spring plunger with controlled initial and final end force: 1 pound initial to 5 pounds final
• 1/4-20 external thread with 0.5-inch thread length for standard tapped-hole installation
• Knobless threaded stud design allows low-profile, recessed mounting
• Maximum plunger diameter of 0.144 inches with a plunger diameter tolerance of +0.001 inches
• Locking element included to secure the plunger body position after installation
• Compact body length of 0.625 inches with 0.125-inch plunger projection for space-constrained assemblies

Compatibility

Designed as a standard-fitment non-locking spring plunger for tapped bores accepting a 1/4-20 threaded stud in light industrial fixtures, jigs, tooling plates, and mechanical assemblies.

Installation Notes

Installation is performed by threading the stud body into a properly tapped 1/4-20 bore using an appropriate hex key or spanner tool on the body flats. Verify the bore depth accommodates the 0.625-inch body length and allows the full 0.125-inch plunger projection. The integrated locking element should be engaged after final positioning to prevent the plunger from backing out under vibration. Do not overtighten, as excess torque can deform the plunger housing or alter spring force characteristics.