Precision Brand 04040 Square Key Stock 12 in 4 Piece

Product Description

The PRECISION BRAND 04040 is a square key stock used to secure rotating components such as gears, pulleys, and sprockets to shafts in mechanical power transmission assemblies. Each piece measures 12 inches in length and 12 millimeters square in cross-section, conforming to DIN 6880 material specifications. Constructed from low-carbon steel with a gold dichromate finish, the 04040 offers corrosion resistance suitable for general industrial and mechanical maintenance applications. This pack contains four pieces, making it a practical choice for shops and technicians who need to keep standard key stock on hand. Machinists, millwrights, and maintenance mechanics are the typical installers.

Square key stock of this size is commonly used in light to medium-duty power transmission applications across industrial equipment, agricultural machinery, pump assemblies, and conveyor systems. The 12 millimeter square profile fits standard keyway cuts machined to DIN 6880 tolerances. The 12-inch length allows field cutting to the required finished key length using a hacksaw, angle grinder, or mill. This product ships in a package of four pieces, providing enough material for multiple jobs or replacements in a single order.

Key Features

• Square profile at 12 millimeters x 12 millimeters cross-section for standard keyway fitment
• Low-carbon steel construction meets DIN 6880 material specification
• Gold dichromate finish provides corrosion resistance for general-purpose use
• 12-inch length allows field cutting to job-specific dimensions
• Sold in a pack of four pieces to support multiple repairs or installations

Compatibility

Designed as a standard DIN 6880 square key stock replacement for shaft and hub keyway applications requiring a 12 millimeter square profile. Confirm keyway dimensions on the shaft and hub before installation.

Installation Notes

Installation is typically performed by machinists, millwrights, or qualified maintenance mechanics. Disconnect and lock out all power to the equipment before removing or installing key stock. Cut the key stock to the required length using appropriate metal-cutting tools and deburr all cut edges before assembly. Do not force-fit key stock into undersized keyways; verify that keyway dimensions match the key cross-section to prevent damage to the shaft or hub.