3/16" x 1-7/8" Zinc Plated Steel #126H1 Woodruff Keys WKS-159 (6 pcs.)
Nominal Size: #126H1
Type: Woodruff Key
Box of 6.
A woodruff key or half-moon key, is a semicircular shaped, removable key that fits into a matching keyway cut into a shaft, leaving a protruding tab. The tab mates with a matching slot on a device mounted flush upon the shaft e.g. a pulley, thus preventing the device from freely rotating about the shaft. It is widely used in machine tools and in the automotive industry.