Gibraltar MT7681-G Straight Ejector Pin 4mm 500mm Steel

Product Description

The GIBRALTAR MT7681-G is a straight ejector pin designed for use in injection mold tooling and die-casting applications. It serves as a precision component that ejects finished parts from mold cavities at the end of each cycle. The pin measures 4 mm in diameter with an overall length of 500 mm and a usable pin length of 497 mm. It is machined from steel and finished with a nitride surface treatment, which improves hardness and wear resistance at the pin surface. The head measures 8 mm in diameter and 3 mm in height, providing positive retention in the ejector plate. This part is installed and replaced by toolmakers, mold technicians, and die maintenance professionals.

This ejector pin is suited for plastic injection molds, compression molds, and die-casting tooling where standard straight ejector pin configurations are required. The 4 mm diameter and 500 mm overall length make it appropriate for deeper mold cavities that demand extended reach. It is typically used in high-cycle production tooling where pin wear requires periodic replacement. The nitride finish supports performance in abrasive and thermally demanding mold environments.

Key Features

• 4 mm pin diameter for compatibility with standard ejector pin bores at that size
• 500 mm overall length with 497 mm active pin length for deep-cavity mold applications
• 8 mm head diameter and 3 mm head height for positive seating in ejector retainer plates
• Steel construction with nitride finish for improved surface hardness and wear resistance
• Straight ejector pin geometry for direct drop-in replacement in standard mold bases

Compatibility

Designed as an OEM-style replacement straight ejector pin for standard injection mold tooling and die-casting mold bases that accept a 4 mm diameter straight ejector pin with an 8 mm head.

Installation Notes

Ejector pin replacement and installation is performed by qualified toolmakers or mold maintenance technicians. The mold should be fully de-energized, cooled, and safely supported in an appropriate mold stand or press before any ejector system disassembly. Pins should be inspected for burrs or scoring before installation, and the ejector plate bore should be checked for proper clearance. Follow the mold manufacturer's assembly procedures and applicable shop safety practices when servicing ejector systems.