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 nut

1. 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.
References in periodicals archive ?
Fix overflow pipe to the overflow holes, screwing the outlet to the back nut.
When fitting taps to a rim made from a thin material (such as pressed steel), use a "top-hat" spacer fitting placed under the back nut.
My pals wouldn't believe me - but they went green with envy when I came back nut brown.
Threaded End Piece,2 01 No Socket And 3 02 Nos Back Nut.
The connectors consist of both a back nut and body for secure positioning, and then are pre-assembled before delivery and easily attach to the prepared cable in one piece.