Holo-krome 72436 Hex Socket Cap Screw 1-1/2-6 Unc

Product Description

The HOLO-KROME 72436 is a heavy-duty hex socket cap screw designed for high-strength fastening applications in industrial, mechanical, and structural assemblies. Built from alloy steel with a black oxide coating, this screw delivers strong corrosion resistance and reduces galling during installation. It carries a 1-1/2-6 UNC thread size and measures 5.5 inches in length under the head. The 1-inch hex drive socket requires a standard hex key or Allen-style driver of the matching size. Compliance with ASME B18.3 and ASTM A574 confirms it meets recognized dimensional and mechanical property standards for alloy steel socket cap screws. Machinists, millwrights, and maintenance technicians are the primary installers of this fastener.

This screw is suited for use in heavy equipment assembly, machine frames, fixture mounting, and high-load mechanical joints where a recessed drive and flush or low-profile head seating is required. The partially threaded shank provides a bearing surface in the grip area, making it appropriate for applications where shear load transfer through the unthreaded shank is part of the joint design. It is commonly used in manufacturing facilities, fabrication shops, and industrial maintenance environments.

Key Features

• 1-1/2-6 UNC thread size for heavy fastening loads
• 5.5-inch length under head with partial threading for shear-load joints
• Alloy steel construction meets ASTM A574 mechanical property requirements
• Black oxide finish provides moderate corrosion resistance and reduces surface galling
• 1-inch hex socket drive compatible with standard Allen keys and hex socket drivers
• Conforms to ASME B18.3 dimensional standards

Compatibility

Designed as an OEM-style and aftermarket replacement hex socket cap screw for industrial machinery, structural assemblies, and mechanical fixtures requiring a 1-1/2-6 UNC thread and a 1-inch hex drive.

Installation Notes

Installation should be performed by qualified machinists, millwrights, or maintenance technicians familiar with high-torque fastener applications. Ensure mating threads are clean, undamaged, and properly tapped to 1-1/2-6 UNC specification before driving the screw. Use a calibrated torque wrench with an appropriate hex socket adapter to achieve the design clamp load without overloading the joint. Apply thread lubricant or anti-seize compound as required by the joint specification to account for the black oxide surface friction characteristics.