Value Collection 581202BR Hex Socket Cap Screw 1-3/8-6 Unc

Product Description

The VALUE COLLECTION 581202BR is a partially threaded hex socket cap screw designed for high-strength fastening applications in industrial, mechanical, and structural assemblies. It features a 1-3/8-6 UNC thread size and a 14-inch length under the head, making it suited for thick-section clamping where standard-length fasteners fall short. Manufactured from alloy steel with a black oxide finish, this screw delivers tensile strength and corrosion resistance appropriate for demanding service environments. It is driven with a 1-inch hex key and conforms to ASME/ANSI B18.3 and ASTM A574 standards. Machinists, maintenance mechanics, and industrial assembly technicians are the primary installers.

This screw is used in heavy equipment assembly, machine tool fixturing, jig and fixture construction, and structural steel fabrication where a recessed-drive, high-torque fastener is required. The partial threading allows for shank engagement in clearance holes, which provides better alignment and shear resistance compared to fully threaded equivalents. Applications span manufacturing plants, fabrication shops, and industrial maintenance environments. The long 14-inch shank makes it particularly useful for stacking materials or securing thick assemblies that require a fastener with substantial grip length.

Key Features

• 1-3/8-6 UNC thread form for coarse-pitch engagement in alloy steel and cast iron bores
• 14 inches length under head provides grip length for thick-section assemblies
• Partially threaded shank improves alignment and shear load performance in clearance holes
• Alloy steel construction meets ASTM A574 mechanical requirements for high-strength socket cap screws
• Black oxide finish reduces surface corrosion and light rust in dry or mildly humid environments
• 1-inch hex drive accepts standard hex keys and socket drive tools for high-torque installation

Compatibility

Designed as an OEM-style and aftermarket replacement fastener for industrial machinery, structural fixtures, and equipment assemblies requiring a 1-3/8-6 UNC partially threaded socket cap screw conforming to ASME/ANSI B18.3 and ASTM A574.

Installation Notes

Installation should be performed by a qualified machinist or mechanical technician using a calibrated torque wrench and a 1-inch hex key or socket drive. Ensure the mating tapped hole is clean, free of debris, and cut to the correct UNC thread specification before driving. Lubrication of the thread is recommended to achieve accurate clamp load and prevent galling on alloy steel surfaces. De-energize and lock out any equipment before replacing or installing fasteners in live machinery per applicable OSHA lockout/tagout procedures.