Value Collection 40242 Hex Socket Cap Screw 3/8-24 Unf

Product Description

The VALUE COLLECTION 40242 is a partially threaded hex socket cap screw designed for high-strength fastening applications in mechanical, industrial, and trade assemblies. It features a 3/8-24 UNF thread size with a 2-inch length under head and a 5/16-inch hex drive. Constructed from alloy steel with a black oxide finish, this fastener delivers corrosion resistance and surface hardness suited to demanding service conditions. It conforms to ASME/ANSI B18.3 and ASTM A574 standards, making it appropriate for load-bearing and torque-critical connections where dimensional consistency is required.

This cap screw is used in general mechanical assembly, equipment repair, and fabrication work across HVAC, plumbing, electrical, and industrial maintenance trades. The 3/8-24 UNF fine-thread pitch provides tight clamping force and resistance to loosening under vibration, making it well suited for mounting brackets, equipment panels, pump housings, and similar structural connections. The black oxide coating reduces light reflection and offers mild rust inhibition in indoor or sheltered environments.

Key Features

• 3/8-24 UNF fine thread for high clamping load and vibration resistance
• 2-inch length under head, partially threaded for precise grip-zone control
• 5/16-inch hex socket drive compatible with standard Allen keys and hex bit drivers
• Alloy steel construction meets ASTM A574 high-strength fastener requirements
• Black oxide finish provides mild corrosion resistance and reduced glare
• Conforms to ASME/ANSI B18.3 dimensional standards

Compatibility

Designed as a standard UNF-thread hex socket cap screw for use in any application requiring a 3/8-24 thread form and conforming to ASME/ANSI B18.3 fastener geometry.

Installation Notes

Installation is performed with a 5/16-inch hex key or hex socket bit driver. Ensure mating threads are clean and free of debris before installation. Partial threading requires that the fastener seat fully against the bearing surface before torque is applied. Always power down or de-energize associated equipment before performing fastener work on live mechanical systems.