Gibraltar 57081XG Threaded Spring Plunger 1/2-13 Steel

Product Description

The GIBRALTAR 57081XG is a threaded spring plunger with a 1/2-13 thread size and a standard 1-1/4 inch thread length. It delivers an initial end force of 6.6 pounds and a final end force of 17.4 pounds, making it suitable for positioning, indexing, and light-duty detent applications in mechanical assemblies. The plunger diameter measures 0.248 inches with a 1/4 inch projection. Both the body and nose are constructed from steel with a black finish. This type of component is typically installed by machinists, tool and die technicians, or maintenance mechanics working on jigs, fixtures, and machine tooling.

This spring plunger is used in industrial and mechanical settings where a threaded, spring-loaded retention or positioning element is required. Common applications include fixture plates, tooling blocks, workholding devices, and assembly jigs where controlled plunger engagement and release are needed. The 1/2-13 thread allows installation into standard tapped holes without special tooling. The no-locking-element design suits applications where the plunger must be field-removable or periodically serviced without staking or adhesive retention.

Key Features

• 1/2-13 thread size with 1-1/4 inch thread length for standard tapped-hole installation
• 6.6 pound initial end force and 17.4 pound final end force for reliable detent and positioning performance
• Steel body and steel nose construction with black finish for durability
• 0.248 inch plunger diameter with 1/4 inch projection
• No locking element — field-removable without staking or thread-locking compound
• 1/4 inch hex size for installation with a standard hex wrench

Compatibility

Designed as an OEM-style threaded spring plunger for standard 1/2-13 tapped holes in industrial fixtures, tooling plates, and mechanical assemblies.

Installation Notes

Installation is performed by threading the plunger into a clean, properly tapped 1/2-13 hole using a 1/4 inch hex wrench. Ensure the mating bore is free of debris and correctly sized before installation to avoid thread damage. De-energize or lock out any machine or assembly before installing or removing spring plungers to prevent unintended movement. Do not over-torque, as this may damage the body or distort thread engagement.