JSA JIS B 6339. Machining Centers - Tool Shanks and Retention Knobs. Publication date: 1992-01   (Language: English).
Standard presents tabulated manufacturing drawings and specifications for BT Shanks.
JSA JIS B 6339. Japanese Standards Association

The BT Flange is also known as
JMTBA MAS-403 "BT"
JIS B 6339 - 1986
JIS B6339 - 1992
ISO 7388/1 - 1983

DIN 509. Relief Grooves and Undercuts for shafts and holes.
This standard is referenced by other HSK standards and must be acquired to build HSK shanks. Publication: 2006-12; (Language: German).
DIN509.