Holo-krome 08104 Shoulder Screw 5/8 in Alloy Steel Hex Socket

Product Description

The HOLO-KROME 08104 is a hex socket shoulder screw machined from Grade 8 alloy steel, designed for precision fastening applications that require an accurate, hardened bearing surface. The shoulder diameter measures 0.625 inches with a shoulder length of 1.75 inches, providing a close-tolerance pivot or guide pin surface. The threaded end is 1/2-13 UNC with a 0.75-inch thread length. Drive engagement is a 5/16-inch hex socket, accessed with a standard hex key. This fastener carries an uncoated finish and conforms to ASME B1.1 and ASME B18.3 dimensional standards. Mechanical and industrial maintenance technicians install these screws where a precision cylindrical shoulder must carry shear load or act as a locating pin within a machined bore.

Shoulder screws like the 08104 are used across industrial machinery, jigs, fixtures, die sets, and automated equipment where a rotating or sliding component must pivot on a hardened, dimensionally consistent shaft. The rounded head profile sits flush against mating surfaces without interference. At 2.875 inches overall length, this screw fits applications requiring a full 1.75-inch exposed shoulder above a standard threaded insert or tapped hole. Maintenance technicians, toolmakers, and millwrights commonly specify this fastener when rebuilding fixtures, replacing worn pivot pins, or constructing new tooling assemblies.

Key Features

• Grade 8 alloy steel construction for high shear strength and wear resistance
• 0.625-inch shoulder diameter with 1.75-inch shoulder length for precision locating and pivoting
• 1/2-13 UNC thread with 0.75-inch thread length for secure engagement in standard tapped holes
• 5/16-inch hex socket drive for controlled torque application with a standard hex key
• Rounded head, 0.875 inches in diameter and 0.375 inches tall, for low-profile seating
• Meets ASME B1.1 and ASME B18.3 standards for dimensional accuracy and thread form

Compatibility

Designed as a standard ASME B18.3 hex socket shoulder screw for use in industrial fixtures, jigs, die sets, and machinery wherever a 0.625-inch shoulder diameter and 1/2-13 UNC threaded end are specified.

Installation Notes

Installation requires a 5/16-inch hex key or socket driver rated for the fastener grade. Ensure the receiving bore is machined to a tolerance compatible with a 0.625-inch shoulder for proper fit and function. De-energize and lock out all power and hydraulic sources before servicing any machinery or tooling assembly containing this fastener. Do not substitute a lower-grade fastener in applications where Grade 8 shear strength is specified.