Holo-krome 08134 Shoulder Screw 3/4 in Alloy Steel Hex Socket

Product Description

The HOLO-KROME 08134 is a hex socket shoulder screw machined from grade 8 alloy steel, designed for precision fastening applications that require a controlled bearing surface. The shoulder diameter measures 0.750 inches and the shoulder length is 2.5 inches, providing a smooth, close-tolerance shank that serves as a bearing, pivot, or guide pin within a mated assembly. The 3/8-inch hex socket drive allows for high-torque installation in confined spaces. Thread size is 5/8-11 UNC with a thread length of 0.875 inches. This screw is supplied with an uncoated finish and meets ASME B18.3 and ASME B1.1 standards. Installation is typically performed by maintenance mechanics, millwrights, or industrial technicians.

Shoulder screws of this type are used across a wide range of industrial and mechanical assembly applications, including jigs and fixtures, linkage assemblies, die sets, and pivot mechanisms. The precision-ground shoulder functions as a locating or bearing surface rather than simply a clamping element. The rounded head profile and hex socket drive make this screw suitable for countersunk or flush-mount assemblies where wrenching clearance is limited. The grade 8 alloy steel construction supports use in moderate-to-high load environments.

Key Features

• Shoulder diameter of 0.750 inches provides a precision bearing and locating surface
• 2.5-inch shoulder length suits deep pivot and guide-pin applications
• 5/8-11 UNC thread with 0.875-inch thread length for secure clamping engagement
• Grade 8 alloy steel construction for high tensile strength in load-bearing use
• 3/8-inch hex socket drive allows installation with standard Allen or hex-key tooling
• Uncoated finish; meets ASME B18.3 and ASME B1.1 standards

Compatibility

Designed as a standard ASME B18.3 shoulder screw for use in industrial fixtures, tooling, and mechanical assemblies requiring a 0.750-inch shoulder diameter and 5/8-11 UNC threaded engagement.

Installation Notes

Installation is performed with a 3/8-inch hex key or Allen driver; ensure the receiving bore is machined to the appropriate close-tolerance fit for the 0.750-inch shoulder before assembly. Do not apply thread-locking compounds to the shoulder itself, as this can interfere with the bearing function of the shank. Always torque to the thread specification appropriate for the mating material and fastener grade. Follow applicable machinery and fixture safety lockout procedures before installing or removing shoulder screws in powered equipment.