Value Collection MP72178 Hex Socket Cap Screw 3/8-16 Unc

Product Description

The VALUE COLLECTION MP72178 is a partially threaded hex socket cap screw designed for secure mechanical fastening in industrial and trade applications. It features a 3/8-16 UNC thread size and measures 3.5 inches under the head, making it suited for medium-depth fastening tasks. The screw is driven by a 5/16-inch hex (Allen) key. Constructed from alloy steel with a black oxide finish, it meets ASME B18.3 and ASTM A574 standards, providing reliable tensile strength and basic corrosion resistance in controlled environments. This fastener comes in a pack of 5.

This screw is commonly used in mechanical assemblies, equipment mounting, machine frames, and structural fixture work where a recessed-drive, high-strength fastener is required. The 3/8-16 UNC thread is a widely used coarse-thread standard, compatible with tapped holes and threaded inserts found throughout HVAC equipment frames, pump housings, electrical enclosures, and general industrial machinery. Partial threading provides stronger clamping force in through-bolt applications.

Key Features

• 3/8-16 UNC coarse thread for broad compatibility with standard tapped holes
• 3.5-inch length under head suits medium-depth fastening applications
• 5/16-inch hex socket drive for use with standard Allen keys or hex bit drivers
• Alloy steel construction meets ASTM A574 high-strength fastener specification
• Black oxide finish provides mild corrosion resistance and reduces glare
• Partial threading delivers improved clamping force in through-bolt configurations

Compatibility

Designed as a standard 3/8-16 UNC hex socket cap screw suitable for use in any application requiring an ASME B18.3 or ASTM A574 compliant fastener with a 5/16-inch hex drive.

Installation Notes

Installation is typically performed by mechanics, millwrights, HVAC technicians, or plumbers during equipment assembly or service. De-energize and isolate any equipment before working on fastened assemblies. Use a properly sized 5/16-inch hex key or bit driver to avoid rounding the socket. Apply thread-locking compound where vibration may loosen the fastener over time.