P-NPT Size (in.) | Px-NPT Size (in.) | Basic Ordering Number | L | F | B | Bx | Minimum Opening | | 1/8 | 1/8 | HN-NS2 | 25.7 | 11.1 | 9.7 | 9.7 | 4.8 | | 1/4 | 1/4 | HN-NS4 | 35.6 | 14.3 | 14.2 | 14.2 | 7.1 | | 3/8 | 3/8 | HN-NS6 | 36.3 | 17.5 | 14.2 | 14.2 | 9.7 | | 1/2 | 1/2 | HN-NS8 | 46.7 | 22.2 | 19.1 | 19.1 | 11.9 | | 3/4 | 3/4 | HN-NS12 | 46.7 | 27.0 | 19.1 | 19.1 | 15.7 | | 1 | 1 | HN-NS16 | 58.9 | 34.9 | 23.9 | 23.9 | 22.4 | |  |