Holo-krome 08097 Shoulder Screw 1/2 in Alloy Steel Hex Socket

Product Description

The HOLO-KROME 08097 is a Grade 8 alloy steel shoulder screw designed for precision mechanical assemblies requiring a hardened, close-tolerance bearing surface. The screw features a 0.5-inch shoulder diameter and a 4.75-inch shoulder length, providing an accurate pivot or guide surface for rotating or sliding components. The 3/8-16 threaded section measures 0.625 inches in length and conforms to UNRC thread standards. 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. The uncoated finish leaves the alloy steel surface exposed, making it suitable for applications where coating buildup or dimensional interference is a concern. Machinists, maintenance technicians, and assembly professionals install this fastener type.

This shoulder screw is used in jigs, fixtures, dies, and machine assemblies where a precision-ground cylindrical shoulder acts as a bearing journal, dowel, or guided travel pin. The 4.75-inch shoulder length accommodates thicker assemblies or stacked components. Common applications include linear guides, linkages, cam followers, and tooling fixtures in industrial and manufacturing environments. The coarse 3/8-16 thread provides secure clamping into tapped holes in steel, aluminum, or cast iron structures. Conforms to ASME B18.3 and ASME B1.1 dimensional standards.

Key Features

• 0.5-inch shoulder diameter with 4.75-inch shoulder length for extended bearing surface
• Grade 8 alloy steel construction for high tensile strength and wear resistance
• 3/8-16 UNRC threaded end, 0.625 inches long, for secure pull-down into tapped holes
• 0.25-inch hex socket drive in a 0.75-inch diameter rounded head
• Uncoated finish maintains precise shoulder dimensions
• Conforms to ASME B18.3 and ASME B1.1 standards

Compatibility

Designed as a standard ASME B18.3 shoulder screw for use in tapped 3/8-16 holes in jigs, fixtures, dies, and precision mechanical assemblies requiring a 0.5-inch nominal shoulder diameter.

Installation Notes

Installation is performed by machinists or mechanical assembly technicians using a 0.25-inch hex key. Ensure the receiving tapped hole is clean and meets 3/8-16 UNRC thread specifications before driving the screw. Do not over-torque the threaded section, as the clamping load should seat the shoulder flush against the mating surface without deforming the bore. Inspect the shoulder for nicks or burrs before installation to preserve bearing surface accuracy.