| 释义 |
back nut back nut[′bak ‚nət] (design engineering) A threaded nut, one side of which is dished to retain a grommet; used in forming a watertight pipe joint. A locking nut on the shank of a pipe fitting, tap, or valve. back nut1. A threaded nut, one side of which is dished to retain a grommet; used in forming a watertight pipe joint. 2. A locking nut on the shank of a pipe fitting, tap, or valve. |