Value Collection 581756BR Hex Socket Cap Screw 7/8-9 Unc

Product Description

The VALUE COLLECTION 581756BR is a hex socket cap screw designed for high-strength fastening applications in mechanical assemblies, industrial equipment, and structural connections. It features a 7/8-9 UNC thread size and a 4.75-inch length under the head, with partial threading for controlled engagement depth. Made from alloy steel with a black oxide finish, this screw delivers corrosion resistance and a clean, low-reflectance appearance. The 3/4-inch hex drive accepts standard hex keys and socket tools for installation. It meets ASME/ANSI B18.3 and ASTM A574 standards, making it suitable for demanding load-bearing applications where dimensional and mechanical consistency is required.

This screw is used in a wide range of trade and industrial settings including HVAC equipment mounting, pump and motor assemblies, structural fabrication, and general mechanical maintenance. The 7/8-9 UNC coarse thread is well-suited for applications requiring quick installation or where the mating material may be softer or prone to thread stripping under fine-thread engagement. The black oxide coating makes it a common choice where slight corrosion inhibition and surface uniformity are needed without the bulk of a plated or painted finish.

Key Features

• 7/8-9 UNC coarse thread for reliable engagement in a broad range of materials
• 4.75-inch length under head with partial threading for precise fastening depth control
• Alloy steel construction meets ASTM A574 mechanical requirements
• Black oxide finish provides mild corrosion resistance and low-reflectance surface
• 3/4-inch hex socket drive compatible with standard hex keys and impact-rated socket sets
• Conforms to ASME/ANSI B18.3 dimensional standards

Compatibility

Designed as a standard ASME/ANSI B18.3 hex socket cap screw for use in any application requiring a 7/8-9 UNC partially threaded fastener with a 3/4-inch hex drive.

Installation Notes

Installation is performed with a 3/4-inch hex key or socket driver rated for the fastener size. Ensure the mating threaded hole or nut is clean and free of debris before seating the screw. Always torque to the specifications required by the equipment manufacturer or applicable structural standard. Alloy steel fasteners should not be mixed with incompatible metals in environments where galvanic corrosion is a concern.