#61 USA Standard Woodruff Keys (3/16" x 5/8") - 10 pc (412309)
by Paulin
USA Standard Woodruff Keys are semi-circular keys that are commonly used for mechanical applications. It fits in a half-moon shaped slot in a shaft leaving the flat side of the tab exposed. They are designed not to function when excessive force is placed on the shaft. Also included in Hillman assortment #46004 / label #46003.