Value Collection 581227BR Hex Socket Cap Screw 1-1/2-6 Unc

Product Description

The VALUE COLLECTION 581227BR is a heavy-duty hex socket cap screw designed for high-strength fastening applications in industrial, mechanical, and structural assemblies. This screw features a 1-1/2-6 UNC thread size with a 20-inch length under the head and is partially threaded for controlled engagement in bolted joint applications. It is driven with a 1-inch hex key and is manufactured from alloy steel with a black oxide finish that provides corrosion resistance in moderate environments. This fastener meets ASME/ANSI B18.3 and ASTM A574 standards, making it appropriate for demanding load-bearing installations. It is typically installed by maintenance technicians, machinists, and mechanical contractors.

This socket cap screw is suited for heavy industrial equipment assembly, large-format structural connections, and machinery maintenance where high tensile strength and precise torque control are required. The partial threading allows the unthreaded shank to bear shear loads, which is a common requirement in machinery and equipment frames. The large 1-1/2-6 UNC thread profile is typical in applications that demand robust clamping force across thick or wide workpieces.

Key Features

• 1-1/2-6 UNC thread size for heavy-duty clamping applications
• 20-inch length under head accommodates thick workpiece stacks
• Partially threaded shank distributes shear loads along the bolt body
• Alloy steel construction delivers high tensile and yield strength
• Black oxide coating provides mild corrosion resistance and reduces light reflection
• Meets ASME/ANSI B18.3 and ASTM A574 standards

Compatibility

Designed as a standard ASME/ANSI B18.3 and ASTM A574 compliant hex socket cap screw for use in tapped holes or with appropriate hex nuts in industrial and mechanical assemblies requiring 1-1/2-6 UNC threading.

Installation Notes

Installation should be performed by qualified machinists or mechanical contractors using a 1-inch hex key or socket driver of adequate length for the 20-inch shank. De-energize, depressurize, or lock out the relevant equipment per OSHA lockout/tagout requirements before fastener installation or removal. Apply a compatible thread lubricant or anti-seize compound on alloy steel fasteners in environments prone to galling. Do not exceed the rated tensile load for the fastener grade as defined by ASTM A574.