Gibraltar 34042 Locking Plunger Threaded Stud 1/4-20

Product Description

The GIBRALTAR 34042 is a locking knob-style plunger with a threaded stud body, designed for indexed positioning and spring-loaded clamping applications in industrial and mechanical assemblies. The plunger features a 1/4-20 external thread with a 0.5-inch thread length and a maximum plunger diameter of 0.124 inches. Initial end force is 1 pound, rising to a final end force of 5 pounds, providing consistent spring tension for holding or indexing components. A locking element is included to lock the plunger in the retracted position, reducing interference during part loading or adjustment. This style ships without an attached knob, making it suitable for flush-mount or custom-handle configurations.

The GIBRALTAR 34042 is used in jigs, fixtures, machine tool assemblies, and industrial workholding equipment where a compact, adjustable indexing plunger is required. The knobless threaded stud design allows the installer to apply a custom handle or integrate the plunger directly into a panel or bracket. The 0.625-inch length under head and 0.125-inch plunger projection suit applications with limited stroke requirements. This part is typically specified by mechanical assemblers, toolmakers, and maintenance technicians working on precision fixtures or production equipment.

Key Features

• Locking element holds plunger in retracted position for hands-free part loading
• 1/4-20 external thread with 0.5-inch thread length for standard tapped-hole installation
• Spring force range: 1 pound initial to 5 pounds final end force
• Knobless threaded stud body accepts custom handles or panel mounting
• Compact plunger projection of 0.125 inches for shallow-stroke applications
• Plunger diameter tolerance of +0.001 inches for consistent fit

Compatibility

Designed as an OEM-style replacement or direct fitment for standard indexed-plunger positions in industrial jigs, fixtures, and mechanical assemblies that accept a 1/4-20 threaded plunger stud.

Installation Notes

Installation is performed by mechanical assemblers or toolmakers using standard hand tools. Thread the stud into a pre-tapped 1/4-20 hole and torque to the fixture or equipment manufacturer's specification. De-energize or lock out any machine the plunger is being installed into before servicing. Do not exceed the rated final end force by compressing the plunger beyond its designed stroke.