Gibraltar 85549939 Counterbored Rest Button Steel

Product Description

The GIBRALTAR 85549939 is a counterbored rest button designed for use in workholding, fixturing, and tooling applications. Machined from heat treated steel and finished with a black oxide coating, this rest button provides a hardened, wear-resistant contact surface for locating and supporting workpieces during machining or assembly operations. It measures 1 inch overall length with a 5/8 inch outside diameter. The black oxide finish offers a degree of corrosion resistance while maintaining close dimensional tolerances. Machinists, toolmakers, and fixture builders install these components to establish repeatable, stable rest points in jigs and fixtures.

This rest button is suited for precision workholding fixtures, machining jigs, and tooling plates used in manufacturing and metalworking environments. The counterbored design allows the button to be secured with a fastener seated below the contact face, keeping the seating surface clear for workpiece contact. It is appropriate for use in both light and moderate-load locating applications where a hardened steel rest point is required.

Key Features

• Counterbored design seats the mounting fastener below the contact face
• Heat treated steel construction provides a hardened, wear-resistant surface
• Black oxide finish for added corrosion resistance
• 1 inch overall length suits standard tooling plate depths
• 5/8 inch outside diameter for a compact footprint in tight fixture layouts

Compatibility

Designed as a standard counterbored rest button for use in machining fixtures, jigs, and workholding tooling plates where a hardened steel locating or rest point is required.

Installation Notes

Rest buttons of this type are typically installed by toolmakers or machinists using standard hand tools and a press or driver appropriate to the mounting configuration. Ensure the mating bore in the fixture plate is machined to the correct diameter and depth before installation. Do not install in applications where loads exceed the rated capacity of the fastener and button assembly. Clean the mounting bore and button shank before pressing or fastening to ensure proper seating and accurate location.