Gibraltar 85549913 Counterbored Rest Button Steel

Product Description

The GIBRALTAR 85549913 is a counterbored rest button machined from heat treated steel with a black oxide finish. Rest buttons are precision workholding components used to support and locate workpieces on fixture plates, jig plates, and machine tool setups. This button measures 0.5 inches in overall length and 0.625 inches in outside diameter. The counterbored design allows fasteners to sit flush or below the seating surface, keeping the contact face clean and flat. Heat treated steel construction provides hardness and wear resistance suited for repeated fixture cycling. Black oxide coating adds a layer of corrosion resistance without affecting dimensional tolerances.

This rest button is used in toolroom, production machining, and fixture-building applications where accurate, repeatable workpiece support is required. It is suited for installation on fixture bodies, tombstones, angle plates, and similar setups found in job shops and production environments. The counterbored configuration is common in applications where the button must be secured from the top without a fastener head protruding above the rest surface.

Key Features

• Counterbored design allows flush or recessed fastener installation at the seating face
• Heat treated steel construction for hardness and long service life under repeated loading
• Black oxide finish provides corrosion resistance while maintaining tight dimensional tolerances
• Compact 0.5 inch OAL suits low-profile fixture applications
• 0.625 inch outside diameter for standard fixture bore fitment

Compatibility

Designed as a standard-style rest button for use in precision fixture plates, jig bodies, and workholding assemblies requiring a counterbored rest surface.

Installation Notes

Rest buttons are typically installed by toolmakers or fixture builders using press-fit or threaded retention methods depending on fixture design. Ensure the mounting bore is clean and dimensionally correct before seating the button. Follow applicable shop standards for press-fit tolerances to avoid distortion of the seating face. Inspect the mating surface for burrs or debris that could compromise flatness and location accuracy.