Gibraltar SW10-4YA-PT-G Threaded Spring Plunger 1/4-28

Product Description

The GIBRALTAR SW10-4YA-PT-G is a threaded spring plunger designed for use in positioning, indexing, and locking applications across mechanical assemblies and fixtures. Featuring a 1/4-28 thread size with a 1 inch thread length and a steel body, this plunger delivers reliable spring-loaded engagement in demanding environments. The unit provides an initial end force of 1 pound and a final end force of 4 pounds, with a maximum plunger diameter of 0.118 inches and a projection of 3/16 inches. A built-in locking element secures the plunger in position once installed, preventing back-out under vibration or repeated cycling. Machinists, tool and die technicians, and mechanical assembly professionals are the typical installers.

This spring plunger is suited for use in jigs, fixtures, machine tool components, and industrial equipment where repeatable, spring-loaded detent or stop action is required. The standard-length plunger profile fits conventional through-hole and blind-hole threaded applications. The 1/4-28 fine thread provides precise installation torque control and is commonly used in precision mechanical assemblies where coarse threads are not appropriate. The steel nose and steel body construction make this plunger suitable for moderate-duty cycle environments where durability and dimensional consistency are required.

Key Features

• 1/4-28 fine thread with 1 inch thread length for standard installation depth
• Steel body and steel nose material for durability in mechanical assembly applications
• Initial end force of 1 pound and final end force of 4 pounds for controlled spring engagement
• Maximum plunger diameter of 0.118 inches with 3/16 inch projection
• Integrated locking element prevents back-out under vibration or repeated use
• Standard plunger length type for straightforward fitment in common threaded bores

Compatibility

Designed as a standard threaded spring plunger for use in mechanical fixtures, jigs, and machine tool assemblies requiring a 1/4-28 threaded bore and a spring-loaded detent or stop function.

Installation Notes

Installation is performed by qualified machinists or mechanical assembly technicians using the appropriate thread-engagement tool for 1/4-28 fine threads. Ensure the mating threaded bore is clean and free of debris before installation. Engage the locking element fully to prevent the plunger from backing out during operation. Do not exceed the recommended installation torque for the thread size and body material as specified by the applicable mechanical assembly standard.