Value Collection 011039P Hex Socket Cap Screw 4-40 Unc

Product Description

The VALUE COLLECTION 011039P is a hex socket cap screw designed for secure, high-torque fastening in tight-clearance applications. Sized at 4-40 UNC with a 5/8-inch length under head, this fastener is fully threaded and driven with a 3/32-inch hex key. Constructed from alloy steel with a black oxide finish, it delivers solid mechanical strength and moderate corrosion resistance in interior or protected environments. Machinists, maintenance technicians, and assembly professionals reach for this style of fastener when a low-profile, high-strength connection is required and a standard hex head will not fit the application.

This cap screw is suited for light mechanical assemblies, precision equipment, electronics enclosures, fixtures, and tooling where a 4-40 UNC thread pattern is specified. The fully threaded shank maximizes thread engagement across the full length under head, which is particularly useful when threading into thin materials or shallow tapped holes. Black oxide coating helps reduce surface reflectivity and provides light rust resistance in dry indoor conditions.

Key Features

• 4-40 UNC thread form for use in standard inch-series tapped holes
• 5/8-inch length under head, fully threaded for maximum thread engagement
• 3/32-inch hex socket drive compatible with standard hex keys and ball-end drivers
• Alloy steel construction for higher tensile strength compared to plain low-carbon steel
• Black oxide finish reduces glare and provides light surface protection in dry environments
• Meets ASME/ANSI B18.3 and ASTM A574 dimensional and mechanical standards

Compatibility

Designed as a standard 4-40 UNC hex socket cap screw suitable for use in any application specifying an ASME/ANSI B18.3 or ASTM A574 inch-series socket cap fastener of this thread size and length.

Installation Notes

Installation is performed with a 3/32-inch hex key or Allen-style driver. Verify that the receiving tapped hole is clean, properly formed to 4-40 UNC specifications, and free of debris before driving. Do not exceed the rated drive engagement or use impact tools on small-diameter socket cap screws, as this risks rounding the socket or fracturing the fastener. Apply thread-locking compound if vibration resistance is required in the final assembly.