Gibraltar SW10-4A-G Threaded Spring Plunger 1/4-20

Product Description

The GIBRALTAR SW10-4A-G is a standard threaded spring plunger designed for indexing, positioning, and light-duty locking applications in mechanical assemblies. It features a 1/4-20 thread size with a 1 inch thread length and a steel body and nose for durability in industrial and trade service environments. The plunger delivers 1 pound of initial end force and 4 pounds of final end force, making it suitable for consistent, repeatable positioning under moderate spring load. This plunger ships individually and is installed by machinists, maintenance technicians, and assembly professionals working with jigs, fixtures, and mechanical positioning components.

This spring plunger is used in light mechanical assemblies where a retractable, spring-loaded nose is needed to hold or index a component in place. Typical applications include machine tool fixtures, panel assemblies, and precision positioning jigs in both production and maintenance settings. The 3/16 inch plunger projection provides adequate travel for standard indexing tasks. The absence of a locking element means the plunger threads freely into the receiving hole without staking or adhesive required for standard service conditions.

Key Features

• 1/4-20 thread size with 1 inch thread length for standard tapped-hole installation
• Maximum plunger diameter of 0.118 inches with 3/16 inch projection
• 1 pound initial end force and 4 pound final end force for consistent spring-loaded indexing
• Steel body and nose construction for durability in industrial environments
• No locking element - installs and removes without staking or thread-locking treatment
• Standard plunger length type suitable for common fixture and jig applications

Compatibility

Designed as an OEM-style replacement or direct-install threaded spring plunger for mechanical assemblies, jigs, and fixtures that accept a 1/4-20 threaded hole with standard plunger geometry.

Installation Notes

Installation is performed by threading the plunger body into a tapped 1/4-20 hole using a hex key or appropriate drive tool. Ensure the receiving hole is clean and free of debris before installation. No power source is required, but always de-energize or lock out any machine or assembly before servicing spring plunger positions. Do not over-torque the plunger body, as the steel threads can seize or strip in softer substrate materials.