NAS 53

Bolt – Close Tolerance Alloy Steel and Alum. Alloy #10-32
Data Sheet by Aerospace Industries Association – National Aerospace Standard, 06/01/1949

NAS 64

Bolt – Close Tolerance Alloy Steel and Alum. Alloy 7/8-14
Data Sheet by Aerospace Industries Association – National Aerospace Standard, 06/01/1949