Midwest Fastener 3/16 in. x 1 in. Woodruff Key

The Midwest Fastener 3/16 in. x 1 in. Woodruff Key is engineered to provide a secure, semi-circular locking fit between shafts and mating hubs or pulleys. Designed to sit securely in a curved key seat, it helps prevent slippage and ensures consistent rotational power transfer under standard mechanical loads. Constructed from durable steel with a protective zinc finish, this fastener resists corrosion and stands up to demanding workshop, industrial, and repair applications. Ideal for maintaining or assembling machinery, motors, and automotive drive systems.