Asked by: Lucilla Imwalle
asked in category: General Last Updated: 18th April, 2020

What is a Backnut?

back nut. [′bak ‚n?t] (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.

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Also to know is, what is a tap Backnut?

Tap backnuts are hexagonal nuts with an integral flange and are used to secure a tap fitting to a basin, sink or bath. Tap backnuts are hexagonal nuts with an integral flange and are used to secure a tap fitting to a basin, sink or bath.

Also Know, what size nut is on a mixer tap? The two most common sizes are 11mm and 13mm. You can get them with two threaded pins that might have a 10mm nut on each.

Keeping this in consideration, what are the parts of a tap called?

Names of Water Tap Parts

  • Handle. The handle is used to turn the tap on to allow the flow of water and to shut if off.
  • Bonnet Nut. The bonnet nut screws onto the stem of the tap, giving a place to attach the handle via a small screw.
  • Stem and Packing.
  • Washer.
  • Valve Body and Valve Seat.

How do you size a nut?

Stretch the tape measure across the nut's diameter to the flat-side directly across from the one your pulling from. If the nut is metric, count the number of lines on the tape measure to find the measurement. If you count 9 lines, the size is a 9-mm (millimeter) nut.

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