Holo-krome 08112 Shoulder Screw 5/8 in Alloy Steel Hex Socket

Product Description

The HOLO-KROME 08112 is a Grade 8 alloy steel shoulder screw designed for precision fastening applications where a controlled-diameter bearing surface is required. The shoulder measures 0.625 inches in diameter and 2.75 inches in length, providing an accurate pivot or guide pin surface. The threaded section is 1/2-13 UNC with a 0.75-inch thread length. Drive is a 5/16-inch hex socket in a rounded head measuring 0.875 inches in diameter and 0.375 inches tall. Overall length is 3.875 inches. The uncoated finish meets ASME B1.1 and ASME B18.3 standards. This fastener is installed by maintenance technicians, millwrights, and mechanical assembly professionals.

Shoulder screws of this type are used in jigs, fixtures, die sets, and mechanical assemblies where a precise cylindrical bearing surface is needed to locate or pivot a component. The 5/8-inch shoulder diameter and 2-3/4-inch shoulder length suit medium-duty industrial and tooling applications. The Grade 8 alloy steel construction supports higher shear and tensile load requirements compared to lower-grade fasteners. This screw is sold individually and is suited for both OEM production builds and maintenance replacement.

Key Features

• 0.625-inch shoulder diameter provides a precision bearing and locating surface
• 2.75-inch shoulder length accommodates thicker fixtures or stacked components
• 1/2-13 UNC thread with 0.75-inch thread length for secure engagement
• Grade 8 alloy steel construction for high shear and tensile strength
• 5/16-inch hex socket drive for reliable torque with standard Allen keys
• Meets ASME B1.1 and ASME B18.3 dimensional standards

Compatibility

Designed as a standard ASME B18.3 shoulder screw for use in industrial fixtures, tooling, die sets, and mechanical assemblies requiring a 5/8-inch diameter shoulder and 1/2-13 threaded engagement.

Installation Notes

Shoulder screws are installed by millwrights, tool and die makers, and mechanical assembly technicians. Before installation, ensure the receiving bore diameter matches the shoulder diameter closely for proper fit and function. Use a calibrated 5/16-inch hex key or driver to apply torque; do not overtighten, as the shoulder must remain free to act as a pivot or guide where required. Follow applicable facility maintenance and machine safety lockout procedures before servicing any assembly containing this fastener.