Holo-krome 72416 Hex Socket Cap Screw 1-1/4-7 Unc

Product Description

The HOLO-KROME 72416 is a partially threaded hex socket cap screw designed for high-strength bolted connections in industrial and mechanical assemblies. It features a 1-1/4-7 UNC thread size with a 7-inch length under head, and accepts a 7/8-inch hex drive. Constructed from alloy steel with a black oxide finish, it delivers the corrosion resistance and surface hardness demanded by maintenance, manufacturing, and heavy equipment applications. The black oxide coating reduces light reflection and provides mild corrosion protection in indoor or low-moisture environments. This fastener conforms to ASME B18.3 and ASTM A574 standards, which specify dimensional tolerances and mechanical strength requirements for socket cap screws.

The 72416 is suited for use in industrial machinery, structural assemblies, tooling fixtures, and heavy-duty mechanical equipment where high clamp load and precise thread engagement are required. Its partially threaded shank allows for accurate bolt-in-shear loading and is common in applications where the grip length must span unthreaded material. Machinists, millwrights, and maintenance technicians typically specify this fastener in fabrication shops, plant maintenance environments, and OEM assembly operations.

Key Features

• 1-1/4-7 UNC thread - coarse thread profile for fast installation and strong engagement in steel and cast iron
• 7-inch length under head - accommodates thick material stacks and long grip lengths
• Partially threaded shank - supports shear loading and precise positioning in bolted joints
• Alloy steel construction - high tensile and yield strength per ASTM A574
• Black oxide finish - mild corrosion resistance with low-reflectance surface treatment
• Conforms to ASME B18.3 and ASTM A574 dimensional and mechanical standards

Compatibility

Designed as a standard ASME B18.3 hex socket cap screw for use in any application requiring a 1-1/4-7 UNC partially threaded fastener with a 7/8-inch internal hex drive.

Installation Notes

Installation requires a 7/8-inch hex key or socket driver rated for the torque demands of a 1-1/4-7 UNC alloy steel fastener. Ensure mating threads are clean and free of debris before installation. Torque to the value specified by the engineering or equipment documentation for the joint - do not estimate torque values for high-strength fasteners in structural applications. Always follow applicable industry standards and site safety procedures when working with large-diameter cap screws in heavy assemblies.