Value Collection 581946BR Hex Socket Cap Screw 1-3/8-6 Unc

Product Description

The VALUE COLLECTION 581946BR is a hex socket cap screw designed for high-strength fastening in industrial, mechanical, and structural applications. It features a 1-3/8-6 UNC thread size with a 5-inch length under the head and is driven by a 1-inch hex (Allen) key. Constructed from alloy steel with a black oxide finish, this fastener meets ASME/ANSI B18.3 and ASTM A574 standards, making it suitable for demanding load-bearing assemblies. The partial threading configuration allows for precise clamping force in bolted joints.

This screw is used in heavy industrial equipment, machinery frames, structural fixtures, and fabrication projects where high tensile strength and a low-profile socket drive are required. The coarse 6 TPI UNC thread is well-suited for use in steel and iron components where rapid assembly and resistance to cross-threading are priorities. Maintenance technicians, millwrights, and fabricators commonly install this fastener in manufacturing and facility maintenance environments.

Key Features

• 1-3/8-6 UNC coarse thread for use in steel and iron assemblies
• 5-inch length under head provides adequate grip in thick material stacks
• 1-inch hex drive socket for high-torque installation with standard Allen tooling
• Alloy steel construction meets ASTM A574 for high tensile strength requirements
• Black oxide finish provides mild corrosion resistance and reduces light glare
• Partially threaded shank allows precise clamping and shear load distribution

Compatibility

Designed as an OEM-style replacement or standard-fitment socket cap screw conforming to ASME/ANSI B18.3 and ASTM A574 specifications, suitable for any application requiring a 1-3/8-6 UNC hex socket cap screw.

Installation Notes

Installation is typically performed by millwrights, maintenance mechanics, or fabricators using a 1-inch hex key or socket drive. Always de-energize and lock out equipment before replacing or tightening fasteners in machinery. Verify hole thread condition and apply appropriate thread lubricant or anti-seize compound as required by the application. Torque to the value specified by the equipment manufacturer or applicable engineering standard.