Gibraltar 57088G Threaded Spring Plunger 1/4-20 Steel

Product Description

The GIBRALTAR 57088G is a threaded spring plunger designed for indexing, positioning, and locating applications in mechanical assemblies. It features a 1/4-20 thread size with a 1 inch thread length and a steel body finished in black. The plunger nose is made from Delrin, delivering smooth, low-friction contact against mating surfaces. A built-in locking element secures the plunger position after installation, preventing loosening from vibration. Initial end force is 3 pounds and final end force is 13 pounds, giving technicians and machinists a predictable spring load range for precise part retention and detent applications.

The 57088G is suited for use in machine tool fixtures, jigs, production equipment, and general industrial assemblies where repeatable spring-loaded positioning is required. The 1/4-20 thread makes it compatible with standard tapped holes in steel, aluminum, and plastic housings. Its compact plunger diameter of 0.118 inches and 3/16 inch projection keep the installed footprint minimal, making it practical in tight assemblies where space is limited. Professionals working in maintenance, fabrication, and fixture building will find this plunger a reliable off-the-shelf solution for detent and retention tasks.

Key Features

• 1/4-20 thread with 1 inch thread length for standard tapped hole installation
• Steel body with black finish for corrosion resistance and durability
• Delrin nose material provides smooth, low-friction plunger contact
• Locking element prevents loosening under vibration
• 3 pound initial end force and 13 pound final end force for predictable spring load
• Compact 0.118 inch plunger diameter and 3/16 inch projection for tight-clearance assemblies

Compatibility

Designed as a standard threaded spring plunger for use in any application with a 1/4-20 tapped hole requiring spring-loaded indexing or positioning.

Installation Notes

Install using a 5/64 inch hex key to thread the plunger body into the prepared 1/4-20 tapped hole. Ensure the mating surface is clean and free of debris before installation. Torque the body to a snug fit using the locking element to secure final position. De-energize or lock out any equipment before servicing assemblies that contain spring plungers under load.