Holo-krome 72428 Hex Socket Cap Screw 1-1/2-6 Unc Alloy Steel

Product Description

The HOLO-KROME 72428 is a heavy-duty hex socket cap screw designed for high-strength fastening applications in industrial, mechanical, and structural assemblies. It carries a 1-1/2-6 UNC thread size with a 3.5-inch length under the head and is fully threaded throughout. The 1-inch hex drive socket requires a matching hex key or Allen-type driver for installation. Manufactured from alloy steel with a black oxide finish coating, this fastener meets ASME B18.3 and ASTM A574 standards, making it suitable for applications that demand controlled tensile strength and dimensional consistency. Mechanical contractors, millwrights, and maintenance technicians are the typical installers.

This fastener is used in heavy equipment assembly, industrial machinery mounting, structural steel connections, and other applications requiring large-diameter, high-strength threaded fasteners. The 1-1/2-6 UNC coarse thread profile provides reliable engagement in steel tapped holes and threaded inserts under load. The black oxide finish offers mild corrosion resistance and reduces light reflection, which is appropriate for indoor industrial environments and machine frames where appearance and moderate surface protection matter.

Key Features

• 1-1/2-6 UNC coarse thread for high-load engagement in steel
• Fully threaded shank - 3.5 inches length under head
• 1-inch hex socket drive for high-torque installation
• Alloy steel construction meets ASTM A574 mechanical requirements
• Conforms to ASME B18.3 dimensional standards
• Black oxide finish for mild corrosion resistance in indoor environments

Compatibility

Designed as a standard ASME B18.3 hex socket cap screw suitable for tapped holes and threaded assemblies requiring a 1-1/2-6 UNC coarse thread fastener in alloy steel.

Installation Notes

Installation requires a 1-inch hex key or drive tool capable of delivering adequate torque for the fastener grade. Always de-energize and lock out equipment before installing or removing fasteners in mechanical assemblies. Verify tapped hole thread condition and depth before installation. Torque to values specified by the equipment manufacturer or applicable engineering standards for ASTM A574 alloy steel socket cap screws.