Holo-krome 72016 Hex Socket Cap Screw 3-48 Unc

Product Description

The HOLO-KROME 72016 is a hex socket cap screw designed for precision fastening in tight-clearance applications where a standard hex head wrench cannot reach. Sized at 3-48 UNC with a 1/2-inch length under head, this fully threaded fastener is driven with a 5/64-inch hex key. Constructed from alloy steel with a black oxide finish, it delivers solid mechanical strength and moderate corrosion resistance in indoor and controlled environments. Machinists, millwrights, and mechanical assembly technicians commonly install this fastener in equipment, fixtures, and assemblies requiring a low-profile, high-strength threaded connection.

This screw is suited for light-duty to medium-duty mechanical assemblies where fine-thread engagement and a recessed drive are required. The 3-48 UNC thread form is common in precision instruments, small machine components, and electrical enclosure hardware. The black oxide coating reduces light reflection and provides a finished appearance consistent with professional-grade assemblies. Typical applications include panel mounting, equipment sub-assembly, and fixture fabrication across industrial and commercial maintenance settings.

Key Features

• 3-48 UNC thread for precise, fine-pitch engagement in small fastener applications
• Fully threaded along entire shank length for maximum thread engagement
• 5/64-inch hex socket drive for use with standard Allen or hex key tools
• Alloy steel construction for higher tensile strength than standard carbon steel fasteners
• Black oxide finish for reduced reflectivity and mild corrosion resistance in dry environments
• Conforms to ASME B18.3 and ASTM A574 fastener standards

Compatibility

Designed as an OEM-style and general-use replacement hex socket cap screw for applications requiring a 3-48 UNC thread form and 1/2-inch length under head in alloy steel with black oxide finish.

Installation Notes

Installation is performed by machinists, millwrights, or qualified maintenance technicians using a calibrated 5/64-inch hex key or Allen driver. Ensure the mating threaded hole is clean and free of debris before driving the fastener. Do not exceed the rated torque range for a size 3 alloy steel cap screw as specified in the applicable ASME or ASTM standard. Confirm thread engagement depth is sufficient for the application before final assembly.