Value Collection 581944BR Hex Socket Cap Screw 1-3/8-6 Unc

Product Description

The VALUE COLLECTION 581944BR is a fully threaded hex socket cap screw designed for heavy-duty fastening applications in industrial, mechanical, and structural assemblies. Sized at 1-3/8-6 UNC with a 4-inch length under head, this fastener is driven by a 1-inch hex key and constructed from alloy steel with a black oxide coating for corrosion resistance and reduced surface reflectivity. Machinists, maintenance technicians, and industrial assemblers install this type of fastener where high tensile strength and a compact, recessed drive head are required.

This screw is suited for use in machine assemblies, equipment frames, tooling fixtures, and structural components where a flush or recessed cap-screw profile is needed. The coarse 6 TPI UNC thread pitch allows for faster assembly and is well-suited to applications involving softer base materials or situations where quick engagement is necessary. The black oxide finish helps maintain thread surface integrity during installation and storage.

Key Features

• Thread size 1-3/8-6 UNC with fully threaded shaft for maximum thread engagement
• 4-inch length under head accommodates deep-reach fastening applications
• 1-inch hex drive for use with standard hex keys or socket drivers
• Alloy steel construction provides high tensile strength for demanding load conditions
• Black oxide coating adds mild corrosion resistance and reduces light reflection on exposed surfaces
• Meets ASME/ANSI B18.3 and ASTM A574 fastener standards

Compatibility

Designed as an OEM-style replacement or direct-use fastener for industrial machinery, structural assemblies, and tooling fixtures requiring a 1-3/8-6 UNC hex socket cap screw with a 4-inch grip length.

Installation Notes

Installation is typically performed by machinists or maintenance technicians using a 1-inch hex key or appropriately sized socket driver. Ensure mating threads are clean and free of debris before installation. Follow applicable ASME or equipment manufacturer torque specifications for the fastener grade and joint material. Always de-energize and lock out equipment before replacing or installing fasteners in powered assemblies.