Color Coding for Thread Types: To facilitate easy identification, rethreading tools are color-coded. SAE Thread File 1: 9 - 10 - 12 - 16 - 20 - 27 - 28 - 32. SAE Thread File 2: 11 - 12 - 13 - 14 - 16 - 18 - 20 - 24.
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