Holo-krome 72434 Hex Socket Cap Screw 1-1/2-6 Unc

Product Description

The HOLO-KROME 72434 is a hex socket cap screw designed for heavy-duty fastening applications requiring high tensile strength and corrosion-resistant finish. Sized at 1-1/2-6 UNC thread with a 5-inch length under head, this fastener is partially threaded and accepts a 1-inch hex drive. It is manufactured from alloy steel with a black oxide coating that provides moderate corrosion resistance and reduces surface reflectivity. This screw meets ASME B18.3 and ASTM A574 standards, making it appropriate for structural and mechanical assemblies where dimensional and material compliance is required by spec.

This cap screw is used in industrial, mechanical, and structural applications where large-diameter, high-strength fasteners are required. Typical installations include heavy machinery frames, fabricated steel assemblies, jig and fixture construction, and equipment mounting applications. The partially threaded shank provides a bearing surface that resists shear loading, which is an important consideration in bolted joint design. Licensed tradespeople and industrial maintenance technicians are the primary installers of hardware at this size class.

Key Features

• 1-1/2-6 UNC thread size for heavy-duty clamping force
• 5-inch length under head with partial threading for shear-load resistance
• 1-inch hex socket drive for use with standard hex keys or drive tools
• Alloy steel construction meets ASTM A574 high-strength requirements
• Black oxide finish provides mild corrosion protection and low-glare surface
• Conforms to ASME B18.3 dimensional standards

Compatibility

Designed as an OEM-style and aftermarket replacement hex socket cap screw for industrial and structural bolted assemblies requiring a 1-1/2-6 UNC partially threaded fastener conforming to ASME B18.3 and ASTM A574.

Installation Notes

Installation of large-diameter socket cap screws at this size class typically requires a calibrated torque wrench and a 1-inch hex key or drive socket to achieve proper clamp load. Power down or de-energize any equipment before replacing fasteners in live assemblies. Ensure mating threads are clean and free of debris before installation. Follow applicable ASME or project-specific torque specifications as supplied by the equipment manufacturer or structural engineer of record.