P-NPT Size (in.) | Basic Ordering Number | L | F | E Minimum Opening | B | Lx | Bx | | 1/8 | ST-NS2 | 16.8 | 14.3 | 4.8 | 10.4 | 19.8 | 9.7 | | 1/4 | ST-NS4 | 22.4 | 19.1 | 7.1 | 15.0 | 27.7 | 14.2 | | 3/8 | ST-NS6 | 25.7 | 22.2 | 9.7 | 15.0 | 31.0 | 14.2 | | 1/2 | ST-NS8 | 31.2 | 27.0 | 11.9 | 19.8 | 37.3 | 19.1 | | 3/4 | ST-NS12 | 34.5 | 33.5 | 15.7 | 20.6 | 40.4 | 19.1 | | 1 | ST-NS16 | 41.4 | 41.3 | 22.4 | 25.4 | 50.0 | 23.9 | |  |