National Marker N180190 Steel Key Stock 0.375x12 in

Product Description

The NATIONAL MARKER N180190 is a steel key stock bar measuring 0.375 inches wide by 12 inches long. Key stock is a precision-cut bar used to mechanically lock rotating components — such as gears, pulleys, and sprockets — to shafts in power transmission assemblies. Machined from open hearth steel, this key stock provides the shear strength and dimensional consistency required for reliable shaft-to-hub engagement. It is a standard component stocked and installed by millwrights, maintenance mechanics, and industrial service technicians across commercial and industrial applications.

This key stock is suited for use in general power transmission systems where a 0.375-inch key width is specified. Common install scenarios include pump shafts, fan assemblies, conveyor drives, and motor couplings. It is sold individually and cut to a 12-inch length, allowing the technician to trim the key to the required finished length on site using standard metalworking tools.

Key Features

• Open hearth steel construction provides consistent hardness and shear resistance
• 0.375-inch width by 12-inch length suits a wide range of standard keyway dimensions
• 12-inch length allows field trimming to application-specific finished length
• Sold as a single piece for targeted replacement or repair use

Compatibility

Designed as a standard-dimension replacement or new-installation key stock for shaft-and-hub assemblies requiring a 0.375-inch key width in industrial and commercial power transmission systems.

Installation Notes

Installation is typically performed by a qualified millwright or maintenance mechanic. De-energize and lock out the drive system before removing or installing any shaft components. Key stock should be cut to length and deburred before fitting into the keyway. Ensure proper fit within the keyway tolerances — a loose fit can cause fretting and premature failure.

Technical Specifications

• Width: 0.375 inches
• Length: 12 inches
• Material: Open hearth steel
• Weight: 0.484 pounds
• Sold As: Each
• UPC: 00038613180192

Standard Information

• Brand: NATIONAL MARKER
• Manufacturer Part Number: N180190