1" BSP Brass Flanged Back Nut

The outside diameter of the male 1 inch BSP thread that this backnut fits onto measures 33.25 mm / 1.309 inch.

This nut isn't used for kitchen or bathroom taps, please don't buy it for that purpose.No part of the nut has a physical measurement of 1 inch.

** BSP thread sizes are measured a special way - have a look at our information page for more details **