Value Collection MSC-67480285 Heavy Hex Jam Nut 1-8 Unc

Product Description

The VALUE COLLECTION MSC-67480285 is a heavy hex jam nut threaded to a 1-8 UNC specification with a right-hand thread direction. Machined from steel and left uncoated, this nut is built for applications where a low-profile locking nut is needed alongside a standard hex or heavy hex fastener. At 1-5/8 inches across flats and 35/64 inches in height, it follows heavy hex dimensional standards and is sized for use with 1-inch diameter fasteners. The 2B thread fit class indicates a standard internal thread tolerance suitable for general industrial and structural fastening. Installation is typically performed by millwrights, ironworkers, or maintenance mechanics working on heavy equipment, structural assemblies, or industrial machinery.

This heavy hex jam nut is used in industrial, structural, and mechanical fastening applications where a jam nut is required to lock a primary nut in place or to provide a low-profile threaded connection on a bolt or threaded rod. The heavy hex profile provides a larger bearing surface and greater wrench engagement than a standard hex nut, making it a preferred choice in high-load or vibration-prone assemblies. It is suited for both shop fabrication and field installation in general industrial environments.

Key Features

• 1-8 UNC thread specification for use with 1-inch diameter fasteners
• Right-hand thread direction — standard installation orientation
• Heavy hex profile: 1-5/8 inches across flats for increased wrench engagement and bearing surface
• Low-profile design at 35/64 inches high — functions as a jam or locking nut
• 2B thread fit class — standard internal thread tolerance for general industrial use
• Uncoated steel construction — suitable for applications where coating is applied after assembly or not required

Compatibility

Designed as a heavy hex jam nut for use with 1-inch diameter, 1-8 UNC threaded bolts, studs, and threaded rod in general industrial and structural fastening applications.

Installation Notes

Installation is typically performed by qualified mechanics, millwrights, or ironworkers using an appropriately sized heavy hex wrench or socket. Torque the jam nut against the primary nut using a two-wrench method to achieve a proper locking condition. Inspect threads for damage or contamination before installation. Follow applicable structural or mechanical codes and engineering specifications for the assembly.