Holo-krome 08072 Shoulder Screw 1/2 in Alloy Steel Hex Socket

Product Description

The HOLO-KROME 08072 is a Grade 8 alloy steel shoulder screw designed for precision fastening applications requiring an exact shoulder diameter and length. The shoulder measures 0.5 inches in diameter and 1 inch in length, providing a controlled bearing surface for rotating or sliding components such as linkages, pivots, and jigs. The threaded section is 3/8-16 UNC with a 0.625-inch thread length. Drive engagement is via a 0.25-inch hex socket in a rounded head measuring 0.75 inches in diameter and 0.3125 inches in height. Overall length is 1.937 inches. The uncoated finish leaves the steel bare for applications where coating would affect dimensional tolerance. Licensed machinists, tool and die technicians, and mechanical assembly professionals typically specify and install this fastener.

This shoulder screw is suited for industrial machinery, fixture building, tooling plates, and mechanical assemblies where a hardened, dimensionally precise shoulder is required to guide movement or carry shear load. The 3/8-16 thread size makes it compatible with standard tapped holes in steel, aluminum, and cast iron components commonly found in manufacturing and maintenance environments. It meets ASME B18.3 and ASME B1.1 dimensional standards, making it a direct fit in any application specifying conformance to those standards. Minimum order quantity is 5 pieces; package quantity is 1.

Key Features

• Grade 8 alloy steel construction for high tensile and shear strength
• Precision shoulder diameter of 0.5 inches for tight-tolerance pivot and guide applications
• 1/4-inch hex socket drive for use with standard Allen keys and hex bit drivers
• 3/8-16 UNC thread conforms to ASME B1.1 for compatibility with standard tapped holes
• Meets ASME B18.3 socket screw dimensional standards
• Uncoated finish preserves dimensional accuracy where coatings would add stack-up tolerance

Compatibility

Designed as an OEM-style replacement or direct-fit fastener for any mechanical assembly specifying a 1/2-inch diameter, 1-inch shoulder length, 3/8-16 socket shoulder screw conforming to ASME B18.3 and ASME B1.1 standards.

Installation Notes

Installation requires a 1/4-inch hex key or socket bit driver. Ensure the mating tapped hole is clean and free of debris before threading. Do not use an impact driver, as over-torquing can damage the hex socket recess or distort the precision shoulder. Always confirm the tapped hole thread class matches the 3/8-16 UNRC thread specification before installation.