Gibraltar 646425-G Press Fit Rest Button Low Carbon Steel

Product Description

The GIBRALTAR 646425-G is a ground press fit rest button designed for precision workholding and fixturing applications in machine shops and manufacturing environments. Constructed from low carbon steel with a black oxide coating, this rest button provides a hardened, wear-resistant contact point for locating and supporting workpieces on jigs, fixtures, and tooling plates. Key dimensions include a 31/32-inch overall length, a 1/2-inch head height, a 1/2-inch outside diameter, and a 0.251-inch pin diameter. Installation is achieved via press fit, requiring no additional fasteners. Licensed machinists and toolmakers are the typical installers.

This rest button is suited for use in precision manufacturing, tooling, and fixturing setups where consistent and repeatable workpiece support is required. The ground finish ensures tight dimensional tolerances, making it appropriate for close-tolerance fixture plates in both job shop and production environments. The black oxide surface finish provides mild corrosion resistance while maintaining dimensional accuracy.

Key Features

• Ground press fit design for accurate, repeatable installation in fixture plates
• Low carbon steel construction for durability in industrial workholding applications
• Black oxide coating provides mild corrosion resistance and reduces light reflection
• 0.251-inch pin diameter for consistent press fit retention
• Compact 1/2-inch head height suitable for low-profile fixturing setups

Compatibility

Designed as an OEM-style replacement or direct-use component for standard press fit rest button applications in precision jigs, fixtures, and tooling plates where a 0.251-inch pin diameter press fit rest button is specified.

Installation Notes

Press fit rest buttons are installed by machinists and toolmakers using a shop press or arbor press to seat the pin into a precisely reamed bore. Ensure the mating bore is reamed to the correct tolerance before pressing the button into place. Do not hammer the button directly, as this may damage the ground surface or alter dimensional accuracy. Verify fixture plate material and bore depth are compatible with this button before installation.