Value Collection 821701MSC Flange Bolt 3/8-16 Unc 1-1/4in Grade 8

Product Description

The VALUE COLLECTION 821701MSC is a smooth flange bolt designed for high-strength fastening applications in mechanical, HVAC, and industrial assembly work. It features a 3/8-16 UNC thread, a 1-1/4 inch length under head, and a fully threaded shank, giving installers consistent thread engagement along the full grip length. The integral smooth flange measures 13/16 inches (0.8125 inches) in diameter and distributes clamping load across a wider bearing surface without the need for a separate washer. Manufactured from Grade 8 alloy steel with a phosphate and oil finish, it meets SAE J429 standards for mechanical properties and tensile strength. This bolt suits applications where vibration resistance and high preload are critical.

This flange bolt is used in residential and commercial equipment assembly, HVAC equipment mounting, ductwork bracing, pump and motor mounting, and general structural fastening where a Grade 8 hex-drive fastener is specified. The smooth flange eliminates the need for a flat washer in many installations, reducing component count and simplifying assembly on production lines or field service repairs. Tradespeople in HVAC, plumbing, and industrial maintenance will encounter this fastener in equipment base frames, compressor mounting, and similar structural connections.

Key Features

• 3/8-16 UNC fully threaded shank for maximum thread engagement along entire grip length
• Smooth integral flange at 13/16 inches diameter distributes clamp load without a separate washer
• Grade 8 alloy steel construction provides high tensile and proof load strength
• Phosphate and oil finish offers baseline corrosion resistance and lubricity for consistent torque values
• Meets SAE J429 fastener standard for mechanical and material requirements
• Hex drive compatible with standard hex sockets and wrenches

Compatibility

Designed as an OEM-style replacement or standard-service fastener for any application requiring a 3/8-16 UNC smooth flange bolt with a 1-1/4 inch length under head and Grade 8 alloy steel construction.

Installation Notes

Installation is performed with a standard hex socket or open-end wrench sized for 3/8 inch hardware. Always verify the mating thread is clean and free of damage before assembly. Apply torque in accordance with the equipment manufacturer's specifications for Grade 8 fasteners at this thread size. Minimum order quantity for this part is 100 pieces.