Value Collection 40240 Hex Socket Cap Screw 3/8-24 Unf

Product Description

The VALUE COLLECTION 40240 is a hex socket cap screw designed for high-strength fastening applications where a clean, recessed drive is required. It features a 3/8-24 UNF thread size, a 1-1/2 inch length under head, and a 5/16 inch hex drive. The fastener is fully threaded along its entire shank. Manufactured from alloy steel and finished with a black oxide coating, it meets ASME/ANSI B18.3 and ASTM A574 standards. This screw is installed by mechanics, millwrights, and maintenance technicians working in industrial, mechanical, or structural assembly contexts.

The 40240 is suited for precision fastening where fine thread engagement and high clamping load are needed. The 3/8-24 UNF thread pitch provides greater tensile strength and better resistance to loosening compared to coarse-thread equivalents. The black oxide finish offers mild corrosion resistance and reduces light reflection, making it appropriate for enclosed mechanical assemblies, machinery, and equipment maintenance work. It is a standard choice for applications requiring ASTM A574 alloy steel socket head cap screws.

Key Features

• 3/8-24 UNF fully threaded alloy steel construction for high clamping strength
• 1-1/2 inch length under head suits moderate-depth fastening requirements
• 5/16 inch hex socket drive for use with standard hex keys or allen wrenches
• Black oxide coating provides mild corrosion resistance and a low-glare finish
• Meets ASME/ANSI B18.3 and ASTM A574 dimensional and mechanical standards

Compatibility

Designed as an OEM-style replacement or standard-stock socket cap screw for industrial and mechanical assemblies requiring 3/8-24 UNF fine-thread fasteners conforming to ASME/ANSI B18.3 and ASTM A574.

Installation Notes

Installation is performed by qualified mechanics or maintenance technicians using a properly sized 5/16 inch hex key or T-handle driver. De-energize and lock out any equipment before fastener replacement or assembly work. Do not exceed the rated drive torque for the fastener grade, and ensure mating threaded holes are clean and free of debris before installation.