BS 1660:1972

Dimensions for self holding and self releasing tapers and reduction sleeves, extension sockets and turret sockets for use with tools having Morse and metric 5 per cent taper shanks. Adaptors for use with 7/24 tapers. Dimensions for spindle noses and tool shanks with self release tapers and cotter slots. Gauges suitable for manufacture and verification of the accuracy of certain details of the items specified.