1/2" BSP Rubber Washer

Note this size refers to a British Standard Pipe Thread. This washer fits OVER a 1/2 inch male BSP thread, the washer itself does not measure 1/2 inch.

The inside diameter of the washer measures approx 22mm on the scale of a ruler.

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