Gibraltar SWN10-4Y-PT-G Threaded Spring Plunger 1/4-28

Product Description

The GIBRALTAR SWN10-4Y-PT-G is a standard threaded spring plunger designed for indexing, positioning, and light-duty locking applications in mechanical assemblies. The body is machined from steel with a 1/4-28 unified fine thread and measures 1 inch in both body length and thread length. The plunger tip is nylon, with a minimum diameter of 0.116 inches and a maximum diameter of 0.118 inches, and delivers a 3/16 inch projection. Initial end force is 1 pound and final end force is 4 pounds. A built-in locking element secures the plunger position once installed, preventing vibration-induced back-out during service.

This spring plunger suits precision-fit applications in jigs, fixtures, tooling, and machine components where repeatable detent positioning is required. The 1/4-28 fine thread allows for controlled torque installation into threaded bores in steel, aluminum, or engineered plastic housings. The nylon nose protects mating surfaces from scoring or galling, making this part appropriate for use in sliding-contact or intermittent-engagement assemblies. Machinists, toolmakers, and maintenance technicians working in industrial, manufacturing, and OEM equipment environments are the typical end users.

Key Features

• Steel body construction for strength and durability in mechanical assemblies
• Nylon plunger nose protects mating surfaces from damage during contact
• Locking element prevents vibration-induced loosening after installation
• 1/4-28 unified fine thread for precise, controlled engagement
• 3/16 inch plunger projection with 1 pound initial and 4 pound final end force
• Standard plunger length type for straightforward drop-in replacement or new installation

Compatibility

Designed as an OEM-style replacement or new-installation spring plunger for threaded bores requiring a 1/4-28 fine-thread fit in jigs, fixtures, tooling, and mechanical assemblies.

Installation Notes

Installation requires a properly tapped 1/4-28 threaded bore in the host component. Use an appropriate hex key or spanner tool per the plunger head style to thread the body in by hand, then torque to the host material specification. Power down or de-energize any associated equipment before servicing assemblies containing spring plungers. Do not over-drive the plunger, as bottoming out can damage the internal spring or locking element.