Holo-krome 72248 Hex Socket Cap Screw 1/2-13 Unc

Product Description

The HOLO-KROME 72248 is a partially threaded hex socket cap screw designed for high-strength fastening applications in mechanical assemblies, machinery, and structural components. It features a 1/2-13 UNC thread size and measures 4 inches in length under the head. The 3/8-inch hex drive accepts a standard hex key or Allen wrench for installation and removal. Constructed from alloy steel with a black oxide finish, this fastener delivers solid tensile strength and corrosion resistance suitable for industrial environments. It conforms to ASME B18.3 and ASTM A574 standards, making it a recognized choice for maintenance and manufacturing professionals.

This cap screw is used in general mechanical and industrial applications where a recessed-drive, high-strength fastener is required. It is well suited for fixture assembly, equipment mounting, and machine component retention in both production and maintenance settings. The partial threading provides a smooth shank section, which is preferred when clamping two members where full thread engagement is not needed or where shear loading is a factor. Machinists, millwrights, and maintenance technicians are the primary installers for this fastener type.

Key Features

• 1/2-13 UNC thread for broad compatibility with standard inch-series tapped holes
• 4-inch length under head suits deep clearance and thick-stock applications
• 3/8-inch hex socket drive for secure torque transfer with standard Allen tooling
• Partially threaded shank allows clamping without thread engagement through both members
• Alloy steel construction meets ASTM A574 high-strength cap screw requirements
• Black oxide finish provides mild corrosion resistance and reduced light reflection

Compatibility

Designed as an OEM-style and aftermarket replacement hex socket cap screw for industrial assemblies requiring a 1/2-13 UNC partially threaded fastener conforming to ASME B18.3 and ASTM A574 standards.

Installation Notes

Installation is performed using a 3/8-inch hex key or Allen-drive tool; ensure the drive tool seats fully in the socket before applying torque to avoid rounding. De-energize and lock out all equipment before servicing fastened assemblies per applicable OSHA lockout/tagout procedures. Thread the fastener into a clean, properly tapped 1/2-13 UNC hole and verify thread condition before final tightening. Do not use impact drivers without a properly rated hex-socket bit, as socket damage may result.