Gibraltar 646480-G Press Fit Rest Button Low Carbon Steel

Product Description

The GIBRALTAR 646480-G is a press fit rest button manufactured from low carbon steel with a black oxide coating. It provides a precise, ground-finish locating or support point in fixture, jig, and workholding applications. The button measures 1.375 inches overall length with a 0.875 inch outside diameter and a 0.75 inch head height. The 0.501 inch pin diameter is ground to tolerance for a reliable press fit installation. Machinists, toolmakers, and fixture builders install this type of component when a hardened or treated rest surface is required to support or locate a workpiece accurately.

This rest button is suited for use in machine shop fixtures, jigs, dies, and precision workholding setups. The ground press fit design allows installation directly into a bored hole without additional fasteners. The black oxide surface treatment provides mild corrosion resistance and reduces light reflection in inspection and gauging environments. Typical applications include surface plates, fixture plates, and custom tooling where repeatable part location is critical.

Key Features

• Ground press fit pin for precise hole engagement and repeatable location
• Black oxide coating for mild corrosion resistance and low-reflectance surface
• Low carbon steel construction balances machinability with adequate hardness for rest applications
• 0.501 inch pin diameter ground to close tolerance for consistent press fit
• 0.75 inch head height provides a defined, stable rest surface
• Compact 1.375 inch overall length suits shallow fixture plate installations

Compatibility

Designed as a standard press fit rest button for use in machinist fixtures, jigs, and tooling plates where a 0.501 inch bored press fit hole is specified.

Installation Notes

Installation is performed by toolmakers or machinists using a press or arbor press to drive the button into a precision-bored hole sized for the 0.501 inch pin diameter. Ensure the receiving bore is clean and deburred before pressing the button into place. Do not hammer the button directly without a driver to avoid damaging the ground head surface. Follow shop safety practices and secure the workpiece firmly during press operations.