Holo-krome 08106 Shoulder Screw 5/8 in Alloy Steel Hex Socket

Product Description

The HOLO-KROME 08106 is an alloy steel shoulder screw with a 5/8 inch shoulder diameter and a 2 inch shoulder length. The threaded portion is sized 1/2-13 UNC with a 3/4 inch thread length, giving an overall length of 3-1/8 inches. Drive engagement is a 5/16 inch hex socket in a rounded head measuring 7/8 inch in diameter and 3/8 inch in height. The uncoated alloy steel construction meets Material Grade 8 and conforms to ASME B1.1 and ASME B18.3. This fastener is installed by machinists, maintenance technicians, and mechanical assemblers wherever a precision-ground shoulder is needed to serve as a locating pin, pivot, or guide for moving components.

Shoulder screws of this type are common in jigs, fixtures, machine assemblies, and industrial equipment where a smooth, hardened bearing surface is required through a mating bore. The 5/8 inch shoulder provides a precise cylindrical surface that controls alignment and allows rotational or sliding motion of bushings, links, or other retained components. The 1/2-13 thread engages a tapped hole in the base material, clamping the assembly while leaving the shoulder free to function as a bearing surface. This screw is sold individually and is appropriate for both original equipment and maintenance replacement applications.

Key Features

• 5/8 inch shoulder diameter with a precision-ground 2 inch shoulder length for accurate component alignment
• 1/2-13 UNC thread at 3/4 inch thread length conforms to ASME B1.1 thread standard
• Material Grade 8 alloy steel for high tensile strength in demanding mechanical applications
• 5/16 inch hex socket drive for positive torque engagement with standard Allen keys or hex bit drivers
• Uncoated finish — suitable for post-installation plating, coating, or use as-is in dry or lubricated assemblies
• Meets ASME B18.3 socket screw dimensional standards

Compatibility

Designed as an OEM-style replacement or new-installation shoulder screw for mechanical assemblies, fixtures, and jigs requiring a 5/8 inch shoulder diameter and 1/2-13 UNC threaded engagement.

Installation Notes

Installation is typically performed by machinists or maintenance technicians using a 5/16 inch hex key or hex socket driver. Ensure the mating bore is sized to accept a 5/8 inch shoulder with an appropriate fit tolerance before installation. Do not apply torque to the shoulder surface — drive only through the hex socket in the head. Follow applicable facility or equipment manufacturer torque guidelines for 1/2-13 Grade 8 fasteners.