Gibraltar 831610-G Shoulder Screw 5/8 in Black Oxide Steel

Product Description

The GIBRALTAR 831610-G is a steel shoulder screw designed for precision fastening applications where a controlled-diameter bearing surface is required. The shoulder measures 5/8 inch in diameter and 1 inch in length, providing a smooth, accurate pivot or bearing journal. The threaded portion is 1/2-13 UNC, and the fastener is finished in black oxide for mild corrosion resistance and reduced glare. Drive engagement is via a 5/16 inch hex socket. This type of fastener is commonly installed by machinists, millwrights, and maintenance technicians in mechanical assemblies, jigs, fixtures, and automated equipment.

Shoulder screws of this configuration are used in applications requiring a precise cylindrical post — such as pivot points, linkage pins, guide rails, and die components. The 5/8 inch shoulder diameter and 1 inch shoulder length make this screw suitable for medium-duty mechanical assemblies in both industrial and commercial maintenance settings. The black oxide finish keeps the screw low-profile in assemblies where reflectivity or light surface protection is a concern.

Key Features

• 5/8 inch shoulder diameter provides a precise bearing and pivot surface
• 1 inch shoulder length suits medium-depth pivot and guide applications
• 1/2-13 UNC thread for broad compatibility with standard tapped components
• Black oxide finish offers mild corrosion resistance and reduced surface glare
• 5/16 inch hex socket drive for secure, tool-accessible installation in tight spaces
• Material grade 1137 steel for dependable strength in mechanical assemblies

Compatibility

Designed as a standard shoulder screw for use in mechanical fixtures, jigs, dies, and pivot assemblies requiring a 5/8 inch shoulder diameter and 1/2-13 UNC threaded engagement.

Installation Notes

Installation requires a 5/16 inch hex key or socket driver. Verify that the mating tapped hole conforms to 1/2-13 UNC thread standards before installation. Shoulder screws should be installed to the appropriate torque for the application using calibrated tooling — do not overtighten, as the shoulder must seat flush against the mating surface to function as intended. Always de-energize or lock out machinery before servicing components that include shoulder screws in moving assemblies.