Holo-krome 720003354 Hex Socket Cap Screw 3/4-10 Unc

Product Description

The HOLO-KROME 720003354 is a hex socket cap screw designed for high-strength mechanical fastening in demanding industrial and trade applications. Manufactured from alloy steel with a black oxide coating, this fastener measures 9 inches in length under the head and features a 3/4-10 UNC thread with partial threading along the shank. The 5/8-inch hex drive accepts standard hex keys and Allen-style drivers. The black oxide finish provides a baseline level of corrosion resistance while reducing light reflection in precision assemblies. This screw meets ASME B18.3 and ASTM A574 standards, confirming its suitability for structural and mechanical fastening tasks requiring verified tensile strength.

This fastener is suited for heavy equipment assembly, machine frames, structural fixturing, and other industrial installations where a large-diameter, partially threaded socket cap screw is required. The 3/4-10 UNC coarse thread is well suited for applications involving thick or tapped steel members. Electricians, millwrights, mechanical contractors, and equipment maintenance technicians commonly use this size when assembling or repairing industrial machinery and support structures. Its alloy steel construction makes it appropriate for high-load environments where standard carbon steel fasteners may not meet tensile requirements.

Key Features

• Alloy steel construction meets ASTM A574 tensile strength requirements
• Black oxide coating for corrosion resistance and reduced surface reflection
• 3/4-10 UNC coarse thread for reliable engagement in tapped steel
• Partially threaded shank provides clamp load control in thick assemblies
• 5/8-inch hex socket drive compatible with standard Allen keys and hex bit drivers
• Conforms to ASME B18.3 dimensional standards for socket cap screws

Compatibility

Designed as a standard-dimensioned ASME B18.3 hex socket cap screw for use in any tapped or threaded hole accepting a 3/4-10 UNC fastener with a 9-inch length under head.

Installation Notes

Installation should be performed by a qualified mechanic or maintenance technician using a properly sized 5/8-inch hex key or socket driver. Confirm that the mating tapped hole is clean, properly threaded to 3/4-10 UNC, and free of debris before driving the fastener. Do not exceed the recommended torque for alloy steel cap screws of this diameter as specified by ASME or the equipment manufacturer. Apply thread lubricant or anti-seize compound where environmental conditions may cause galling or corrosion.