Black Malleable Iron Sockets
![Black Malleable Iron Sockets](https://www.stevensonplumbing.co.uk/images/cache/Plumbing/black_iron/0375_inch_back_iron_socket_1.800.jpg)
Black malleable iron sockets (FIG. 270) with female BSP threads.
Black iron pipe fittings are not used with fresh water plumbing, they are best suited for gas / air / oil / sprinkler / heating applications.
** BSP thread sizes are measured a special way - have a look at our information page for more details **
135