TO IDENTIFY AN UNKNOWN THREAD, CERTAIN TOOLS AND DATA ARE NECESSARY. INCLUDED IN THESE CHARTS ARE A HELPFUL COMPILATION OF THE DATA NEEDED FOR THE IDENTIFICATION OF MOST EXTERNAL (MALE) THREADS FROM THE THREE MOST POPULAR THREAD SYSTEMS IN THE WORLD, METRIC STANDARDS, U.S.A.(INCH) STANDARDS, AND THE BRITISH (INCH) STANDARDS. ALSO THIS CHART WILL OUTLINE THE USEFUL TOOLS AND PROCEDURES IN ATTEMPTING TO IDENTIFY AN UNKNOWN THREAD.
THESE ARE THE THREE BASIC STEPS TO IDENTIFY A THREAD:
1. MEASURE THE MAJOR DIAMETER OF THE MALE THREAD. {THE MAJOR DIAMETER IS THE OUTSIDE DIAMETER (OD) OF THE MALE THREAD}. IF YOU ARE TRYING TO IDENTIFY AN INTERNAL (FEMALE) THREAD THESE DATA CHARTS WILL NOT CONTAIN SUFFICIENT INFORMATION. FOR ADDITIONAL INFORMATION ON MEASURING INTERNAL (FEMALE) THREADS; SEE THE INSTRUCTIONS IN CHART VIII.
Blog Apostille