Holo-krome 08074 Shoulder Screw 1/2 in Alloy Steel Hex Socket

Product Description

The HOLO-KROME 08074 is a Grade 8 alloy steel shoulder screw designed for precision mechanical assemblies where tight tolerances and high load capacity are required. It features a 0.5-inch shoulder diameter and a 1.25-inch shoulder length, providing a precision bearing surface for rotating or sliding components such as linkages, pivot points, and jigs. The threaded portion is 3/8-16 UNC with a 0.625-inch thread length. Drive engagement is via a 0.25-inch hex socket on a rounded head measuring 0.75 inches in diameter and 0.3125 inches in height. Overall fastener length is approximately 2.187 inches. The uncoated finish maintains dimensional accuracy for close-tolerance fits.

Shoulder screws of this type are used across industrial maintenance, machine building, and mechanical assembly applications. This specific size is commonly specified in fixture plates, cam mechanisms, conveyor components, and pivot assemblies where the shoulder acts as a precision shaft or bearing journal. Installation is performed by machinists, millwrights, and maintenance technicians working on production equipment, tooling, or custom mechanical assemblies. The Grade 8 alloy steel construction handles elevated shear and tensile loads typical of dynamic pivot and guide applications.

Key Features

• 0.5-inch precision shoulder diameter provides accurate bearing surface for rotating or sliding components
• 1.25-inch shoulder length accommodates standard fixture plate and linkage thicknesses
• Grade 8 alloy steel construction for high tensile and shear strength in demanding applications
• 3/8-16 UNC thread with 0.625-inch thread length for secure clamping engagement
• 0.25-inch hex socket drive for torque application with standard Allen keys or hex bit drivers
• Meets ASME B1.1 and ASME B18.3 dimensional and performance standards

Compatibility

Designed as a standard ASME B18.3 shoulder screw for use in mechanical assemblies requiring a 0.5-inch shoulder diameter and 3/8-16 threaded engagement. Verify shoulder length and thread engagement requirements against your specific assembly drawings before installation.

Installation Notes

Installation requires a 0.25-inch hex key or hex socket driver. Ensure the mating bore is machined to the appropriate tolerance for the shoulder diameter to achieve the intended fit class. Thread the screw into a tapped hole or mating nut to the design torque specified in your assembly documentation. Do not overtighten, as the shoulder, not the thread, carries the primary load in most pivot and guide applications.