Gibraltar 646420-G Press Fit Rest Button 1/2 in Od

Product Description

The GIBRALTAR 646420-G is a ground press fit rest button machined from low carbon steel with a black oxide coating. It is used as a precision locating or support component in fixture, jig, and tooling assemblies. The button measures 27/32 inches in overall length with a 1/2 inch outside diameter and a 3/8 inch head height. The ground finish provides tight dimensional tolerance for accurate part seating. The press fit design allows installation directly into a bored hole without additional fasteners, making it a straightforward component for machine shop and industrial tooling applications.

This rest button is suited for use in workholding fixtures, drill jigs, and precision tooling setups where consistent part location and support are required. The black oxide surface finish offers mild corrosion resistance in shop environments. With a pin diameter of 0.2510 inches, it is designed for interference fit installation into a matching reamed or precision-bored hole. Machinists and toolmakers are the primary installers in manufacturing and maintenance environments.

Key Features

• Ground finish for precise dimensional accuracy and consistent seating
• Press fit design for tool-free, fastener-free installation into bored holes
• Black oxide coating for mild corrosion resistance in shop environments
• Low carbon steel construction for durability in workholding applications
• Pin diameter of 0.2510 inches for interference fit into precision-reamed holes
• Compact profile: 27/32 inches OAL with 3/8 inch head height and 1/2 inch OD

Compatibility

Designed as a standard press fit rest button for use in precision fixture, jig, and tooling assemblies requiring a 1/2 inch outside diameter ground rest button with a 0.2510 inch press fit pin.

Installation Notes

Installation is performed by machinists or toolmakers using a press or mallet to drive the button into a precision-reamed hole sized to the pin diameter. Ensure the receiving hole is clean, deburred, and within tolerance before pressing to avoid galling or misalignment. Do not use the button head as a drive surface; apply force only to the pin during installation. Remove the workpiece from any active machine and isolate power before servicing or replacing fixture components.