Value Collection 581942BR Hex Socket Cap Screw 1-3/8-6 Unc

Product Description

The VALUE COLLECTION 581942BR is a hex socket cap screw designed for high-strength bolted connections in industrial, mechanical, and structural applications. Manufactured from alloy steel with a black oxide finish, this fastener meets ASME/ANSI B18.3 and ASTM A574 standards. The 1-3/8-6 UNC thread and 3-1/2 inch length under head make it suited for heavy-duty clamping loads where a socket-drive interface is required. The 1-inch hex drive is engaged with a standard hex key or Allen driver. This screw is fully threaded along its shank length, allowing maximum thread engagement across the full grip range.

This fastener is commonly used in heavy machinery, industrial equipment assemblies, hydraulic component mounting, and structural fabrication where a recessed hex-drive cap screw is preferred over a hex-head bolt. The black oxide coating provides mild corrosion resistance and reduces light reflection, making it suitable for indoor and moderate-exposure environments. Machinists, millwrights, and maintenance mechanics are the primary installers of this fastener class.

Key Features

• 1-3/8-6 UNC thread form for heavy-duty coarse-thread engagement
• 3-1/2 inch length under head with full threading along the shank
• 1-inch hex socket drive accepts standard Allen keys and hex-drive sockets
• Alloy steel construction for high tensile and shear strength
• Black oxide finish for mild corrosion resistance and reduced reflectivity
• Meets ASME/ANSI B18.3 and ASTM A574 fastener standards

Compatibility

Designed as an OEM-style replacement or standard-supply hex socket cap screw for applications requiring a 1-3/8-6 UNC coarse-thread alloy steel fastener with a 1-inch hex drive.

Installation Notes

Installation is performed by machinists, millwrights, or qualified maintenance personnel using a calibrated torque wrench with a 1-inch hex-drive bit or Allen key. Always verify that the mating tapped hole thread class and material are compatible with the fastener grade before installation. Clean and inspect threads prior to assembly, and apply thread lubricant or anti-seize compound as required by the application specification. De-energize and lock out all equipment before performing any fastener service on live machinery.