Gibraltar Z2440 Threaded Rest Button Low Carbon Steel

Product Description

The GIBRALTAR Z2440 is a threaded rest button used to provide a stable, adjustable contact point in machine tool setups, fixture assemblies, and workholding applications. Manufactured from low-carbon steel with a black oxide coating, this button measures 15/16 inches in overall length with a 3/8-inch head height. The 1/2-20 threaded shank allows secure installation into tapped bores, and the 3/4-inch hex drive simplifies torquing with standard wrenches. Machinists, toolmakers, and fixture builders rely on rest buttons like the Z2440 to establish precise reference surfaces and support workpieces during machining or inspection operations.

The Z2440 is suited for use in manufacturing environments where repeatable workpiece positioning is required. Typical applications include jig and fixture construction, coordinate measuring machine setups, and general machine shop workholding. The black oxide finish provides mild corrosion resistance and reduces light reflection in inspection settings. This part ships in a package quantity of one and is appropriate for both new fixture builds and replacement of worn contact buttons.

Key Features

• Low-carbon steel construction provides durability in machine shop and fixture environments
• Black oxide coating offers mild corrosion resistance and a non-reflective surface
• 1/2-20 threaded shank for secure installation into standard tapped bores
• 3/4-inch hex drive for installation and adjustment with a standard wrench
• 15/16-inch overall length with 3/8-inch head height for precise reference surface geometry

Compatibility

Designed as an OEM-style replacement or new-build component for jigs, fixtures, and workholding assemblies that require a 1/2-20 threaded rest button with a 15/16-inch overall length.

Installation Notes

Installation is performed by machinists or toolmakers using a standard 3/4-inch wrench or hex key as applicable. Ensure the receiving bore is tapped to 1/2-20 specification and free of debris before threading in the button. De-energize or lock out any associated machine before servicing fixture components. Do not overtighten, as excessive torque may damage the threaded shank or alter the reference surface height.