National Marker N180174 Steel Key Stock 0.25x12 in

Product Description

The NATIONAL MARKER N180174 is a steel key stock piece used to secure rotating components such as gears, pulleys, and sprockets to shafts in mechanical and industrial drive systems. Cut from open hearth steel, this key stock provides reliable shear strength and dimensional consistency for both original installation and maintenance repair work. At 0.25 inches wide by 12 inches long, it fits standard keyway slots commonly found in motors, pumps, and power transmission assemblies. Machinists, millwrights, and industrial maintenance technicians are the typical installers.

This key stock is suited for general industrial and mechanical maintenance applications where a standard square or rectangular key is required to transmit torque between a shaft and a hub. The 12-inch length allows the piece to be cut to a custom fit on-site using a hacksaw or angle grinder. It is sold individually, making it a practical single-piece replacement option for a worn or missing key in light to medium duty drive assemblies.

Key Features

• Open hearth steel construction provides consistent hardness and machinability
• 0.25 inches x 12 inches dimensions suit standard keyway slots
• Full 12-inch length can be cut to custom fit on-site
• Sold individually for single-piece repair or replacement
• Lightweight at 0.221 pounds for easy handling and storage

Compatibility

Designed as an OEM-style replacement key stock for mechanical drive assemblies requiring a 0.25-inch wide keyway slot on motors, pumps, gearboxes, or similar rotating equipment.

Installation Notes

Installation is typically performed by a machinist or maintenance mechanic. De-energize and lock out the equipment at the main disconnect before removing or installing any drive components. Ensure the keyway slot in both the shaft and hub are clean and free of burrs before fitting the key. File or grind the cut end of the key stock smooth to prevent stress concentration and ensure proper seating.

Technical Specifications

• Width: 0.25 inches
• Length: 12 inches
• Material: Open hearth steel
• Weight: 0.221 pounds
• Unit of Measure: Each
• Minimum Order Quantity: 1
• UPC: 00038613180178

Standard Information

• Brand: NATIONAL MARKER
• Manufacturer Part Number: N180174