Home › Authors › CSA Committee on Screw Threads. Canadian Standards Association (CSA) 👤 CSA Committee on Screw Threads. Canadian Standards Association (CSA) 1 book Books by CSA Committee on Screw Threads. Canadian Standards Association (CSA) CSA standard B1.1-1949 STANDAR CSA standard B1.1-1949 STANDARD FOR UNIFIED AND AMERICAN SCREW THREADS 1949