Precision Brand 15175 Key Stock 3/8 X 1/8 X 12 in Zinc 6-pack

Product Description

The PRECISION BRAND 15175 is a zinc-finished, low-carbon steel key stock used to transmit torque between a shaft and a mating hub, gear, pulley, or sprocket. Cut to length and fitted into a keyed shaft slot, this stock provides a positive mechanical connection that prevents rotational slipping under load. Each piece measures 0.375 inches wide by 0.125 inches thick by 12 inches long. Hardness is rated Rockwell B80-90, conforming to ASTM A108 material specification. The zinc finish provides basic corrosion resistance for general industrial and mechanical service environments. Machinists, millwrights, and maintenance technicians are the typical installers.

This key stock suits a wide range of industrial and mechanical maintenance applications where a standard rectangular key is required. Typical uses include motor-to-gearbox coupling assemblies, conveyor drive shafts, pump shafts, and fan hubs in both commercial and light industrial settings. The 12-inch length allows the installer to cut individual keys to the exact length needed for the application. Each package contains 6 pieces, providing enough material for multiple repairs or installations from a single order.

Key Features

• Low-carbon steel construction meets ASTM A108 material specification for consistent mechanical properties
• Rockwell B80-90 hardness provides adequate shear resistance for standard shaft-and-hub assemblies
• Zinc finish adds basic corrosion protection for general-duty environments
• 12-inch length allows field trimming to exact key length required
• Standard 0.375 x 0.125 inch rectangular profile fits common keyway dimensions
• Pack of 6 pieces supports multiple jobs or on-hand stock for maintenance departments

Compatibility

Designed as a standard rectangular key stock replacement for shaft-and-hub assemblies requiring a 3/8 inch wide by 1/8 inch thick key profile in general industrial and mechanical applications.

Installation Notes

Key stock installation is typically performed by machinists or millwrights as part of shaft assembly or drivetrain maintenance. Always de-energize and lock out the machine before removing or installing key stock. Cut the key to length using a hacksaw or mill, deburr all edges, and ensure the key fits snugly in the keyway without rocking before pressing or driving it into position. Do not use oversized keys to compensate for a worn keyway, as this can cause shaft or hub damage.