On the following tap size 1. 3/8in.-24UNF-2A , identify thread meaning for UNF? e. External b. Number of threads per inch of length f. Internal a. Major diameter c. Coarse or Fine d. Class of thread Question 6 On the following tap size 5/16 in. -18 UNC-2A, identify thread meaning for 18? c. Coarse or Fine e. External d. Class of thread a. Major diameter f. Internal b. Number of threads per inch of length 10 pts

For the first tap size, :- **UNF** stands for Unified National Fine. Therefore, the correct identification for UNF is: - c. Coarse or FineFor the second tap size, :- The number refers to the number of threads per inch. Therefore, the correct identification for is: - b. Number of threads per inch of length