#13 USA Standard Woodruff Keys (3/16" x 1") - 10 pc (822)
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 #811 / label #62.