Precision Brand 15625 Key Stock 1x3/4x12 in Steel 4-pack

Product Description

The PRECISION BRAND 15625 is a zinc-finished, low-carbon steel key stock bar used to secure rotating components — such as gears, pulleys, and sprockets — to shafts in mechanical drive systems. Each bar measures 1 inch wide by 3/4 inch high by 12 inches long, meeting ASTM A108 material specification. Hardness is rated at Rockwell B80-90, providing reliable shear resistance under typical drive loads. This package contains 4 pieces. Machinists, millwrights, and maintenance technicians install this stock when building or repairing keyed shaft assemblies across industrial and commercial equipment.

Key stock in this size range is commonly used in industrial machinery, conveyor systems, pump drives, and fan shaft assemblies where a keyed connection is required to transmit torque. The 12-inch length allows on-site cutting to fit specific keyway dimensions. The zinc finish provides basic corrosion resistance for indoor and light-duty service environments. Suitable for use wherever ASTM A108 low-carbon steel meets application requirements.

Key Features

• Low-carbon steel construction meets ASTM A108 specification
• Rockwell B80-90 hardness for consistent shear resistance in keyed drives
• 1 inch wide by 3/4 inch high cross-section fits standard keyway profiles
• 12-inch length can be cut to required size on site
• Zinc finish provides light corrosion protection
• Pack of 4 bars per package

Compatibility

Designed as a standard-profile replacement key stock for keyed shaft and hub assemblies requiring a 1 inch by 3/4 inch cross-section bar conforming to ASTM A108 low-carbon steel.

Installation Notes

Installation is typically performed by millwrights or maintenance mechanics. Disengage and lock out all power to the shaft assembly before removing or installing key stock. Cut to length using appropriate metal cutting tools and deburr all edges before fitting into the keyway. Verify keyway dimensions match the bar cross-section before pressing or driving the key into place to avoid damaging the hub or shaft.