Holo-krome 72412 Hex Socket Cap Screw 1-1/4-7 Unc

Product Description

The HOLO-KROME 72412 is a heavy-duty hex socket cap screw designed for high-load fastening applications in industrial, mechanical, and structural assemblies. It features a 1-1/4-7 UNC thread size, a 6-inch length under head, and a 7/8-inch hex drive socket. The fastener is manufactured from alloy steel and finished with a black oxide coating, which provides mild corrosion resistance and reduces light reflection on the fastener surface. Partially threaded along its shank, this screw is engineered to handle significant shear and tensile forces. It weighs approximately 2.966 pounds per piece. Licensed trades and industrial mechanics rely on this size for heavy equipment, machine bases, and structural fixture work.

This cap screw is suited for heavy industrial and commercial applications where large-diameter fasteners are required. Typical uses include securing machine frames, press platens, structural jigs, and heavy fabricated assemblies. The 1-1/4-7 UNC coarse thread engages quickly and provides strong clamping force in steel and ductile iron tapped holes. The black oxide finish is appropriate for indoor or protected environments where exposure to moisture is limited. Installation is performed by machinists, millwrights, and maintenance mechanics using a 7/8-inch hex key or socket drive.

Key Features

• 1-1/4-7 UNC coarse thread for fast engagement and high clamping force
• 6-inch length under head for deep-reach fastening in thick material stacks
• 7/8-inch hex socket drive for use with standard hex keys or drive tools
• Alloy steel construction for high tensile and shear strength
• Black oxide finish for mild corrosion resistance and reduced surface glare
• Partially threaded shank provides shear resistance in close-tolerance bores
• Meets ASME B18.3 and ASTM A574 fastener standards

Compatibility

Designed as an OEM-style and aftermarket replacement hex socket cap screw for applications requiring a 1-1/4-7 UNC thread form per ASME B18.3 and ASTM A574 specifications.

Installation Notes

Installation should be performed by a qualified mechanic or millwright using a calibrated torque wrench and a properly sized 7/8-inch hex drive tool. Always verify that the tapped hole thread form and depth are compatible with the 1-1/4-7 UNC specification before installation. Clean mating threads and apply appropriate thread lubricant or anti-seize compound as required by the assembly specification. De-energize, lock out, and tag out all associated equipment before performing fastener service on machinery.