Mak-a-key 7004370437-12 Undersized Key Stock 18-8 Ss

Product Description

The MAK-A-KEY 7004370437-12 is an undersized key stock bar used to secure rotating components - such as pulleys, sprockets, and gears - to shafts in mechanical drive systems. Measuring 7/16 inches high by 7/16 inches wide by 12 inches long, this bar stock is cut to the undersized tolerance standard, which allows it to slide into keyways with minimal interference for easier assembly. Constructed from 18-8 stainless steel, it offers solid corrosion resistance in wet or chemically exposed environments. Machinists, millwrights, and maintenance technicians select undersized key stock when a precise, clean fit into standard keyways is required without hammering or forcing.

This key stock is suited for use in HVAC equipment, pump assemblies, fan drives, conveyor systems, and general industrial machinery where shaft-to-hub connections must transmit torque reliably. The 12-inch length provides enough stock to cut multiple keys from a single piece, making it a practical choice for shops and field technicians who handle varied shaft sizes. It is appropriate for both light-duty and moderate-duty drive applications where stainless steel is specified for its resistance to rust and oxidation.

Key Features

• Undersized tolerance allows smooth keyway insertion without forced fitting
• 18-8 stainless steel construction resists corrosion in wet and chemically active environments
• Square cross-section: 7/16 inches high by 7/16 inches wide
• 12-inch length provides stock for cutting multiple keys from one piece
• Single-piece package suited for low-quantity maintenance and repair work

Compatibility

Designed as an undersized key stock replacement or new-installation component for standard keyways in rotating shaft assemblies across HVAC, pump, and general industrial drive applications.

Installation Notes

Installation is typically performed by a machinist or qualified maintenance technician. Always de-energize and lock out the drive system before servicing any shaft or hub connection. The key stock should be cut to the required length using appropriate metal-cutting tools and deburred before seating in the keyway. Verify keyway dimensions and fit prior to final assembly to ensure proper torque transmission.