Value Collection 581892BR Hex Socket Cap Screw 1-1/4-7 Unc

Product Description

The VALUE COLLECTION 581892BR is a hex socket cap screw designed for high-strength fastening applications in industrial, mechanical, and structural assemblies. It features a 1-1/4-7 UNC thread size with a 2.25-inch length under head and is fully threaded along its entire shank. The 7/8-inch hex drive socket interface accepts standard hex keys and drive tools. Constructed from alloy steel with a black oxide coating, the screw provides increased hardness and moderate corrosion resistance compared to standard carbon steel fasteners. It meets ASME/ANSI B18.3 and ASTM A574 dimensional and mechanical standards. Machinists, millwrights, and maintenance technicians commonly install this fastener in equipment frames, fixtures, and structural connections.

This screw is suited for heavy-duty bolted joints where a recessed hex drive is preferred over external hex or slotted head styles. The coarse 7 UNC thread pitch makes it a practical choice in applications where quick engagement and resistance to cross-threading matter, such as machinery housings, hydraulic component mounting, and structural steel assemblies. The black oxide finish is typically used in environments with controlled exposure to moisture, where light corrosion protection is acceptable alongside lubrication.

Key Features

• 1-1/4-7 UNC coarse thread for fast, reliable engagement in heavy fastening applications
• Fully threaded shank along the 2.25-inch length under head
• 7/8-inch hex socket drive compatible with standard hex keys and socket drive tools
• Alloy steel construction meets ASTM A574 mechanical property requirements
• Black oxide coating provides moderate corrosion resistance and reduced light reflection
• Conforms to ASME/ANSI B18.3 dimensional standards

Compatibility

Designed as an OEM-style and aftermarket replacement hex socket cap screw for industrial and mechanical assemblies requiring a 1-1/4-7 UNC coarse thread fastener with a 7/8-inch hex socket drive.

Installation Notes

Installation should be performed by a qualified machinist, millwright, or maintenance technician using a properly sized 7/8-inch hex key or socket drive tool. Ensure mating threads are clean and free of debris before installation, and apply appropriate thread lubricant or anti-seize compound per application requirements. Always de-energize, depressurize, or otherwise make the assembly safe before disassembling or replacing structural fasteners. Refer to applicable equipment documentation for torque requirements specific to the assembly.