Holo-krome 720002490 Hex Socket Cap Screw 1/2-13 Unc

Product Description

The HOLO-KROME 720002490 is a partially threaded hex socket cap screw engineered for high-strength fastening applications. It features a 1/2-13 UNC thread size with a 4.25-inch length under head and is driven by a 3/8-inch hex socket. Manufactured from alloy steel with a black oxide finish, this cap screw meets ASME B18.3 and ASTM A574 standards, making it suitable for heavy-duty mechanical assemblies where tensile strength and corrosion resistance are required. The black oxide coating provides mild corrosion protection while reducing light reflection on exposed fastener heads. Licensed tradespeople and industrial mechanics rely on this grade of fastener for demanding structural and mechanical connections.

This cap screw is suited for use in industrial machinery, mechanical assemblies, and structural fabrication where a partially threaded, high-strength fastener is required. The 1/2-13 UNC coarse thread profile is compatible with standard tapped holes and threaded inserts of the same specification. It is commonly installed in manufacturing environments, HVAC equipment frames, pump housings, compressor mounts, and general mechanical assemblies requiring a secure, torque-bearing connection.

Key Features

• 1/2-13 UNC coarse thread for broad compatibility with standard tapped holes
• 4.25-inch length under head with partial threading for clamping-length control
• 3/8-inch hex socket drive for use with standard hex keys and socket drivers
• Alloy steel construction meets ASTM A574 for high tensile and yield strength
• Black oxide finish provides mild corrosion resistance and reduced glare
• Conforms to ASME B18.3 dimensional standards

Compatibility

Designed as a standard alloy steel hex socket cap screw for use in any application requiring a 1/2-13 UNC partially threaded fastener per ASME B18.3 and ASTM A574 specifications.

Installation Notes

Installation should be performed by a qualified mechanic or industrial technician using a calibrated torque wrench and the appropriate 3/8-inch hex key or socket driver. Always ensure the mating tapped hole meets 1/2-13 UNC specifications and is free of debris before installation. De-energize and lockout/tagout any equipment before fastener replacement on live assemblies. Do not use impact drivers on fine-tolerance structural fasteners without verifying torque requirements from the equipment manufacturer.