compression nut - solderless fittings

brass pipe fitting nut for solderless compression fitting, female (inside) BSP thread. offered in the following sizes:
1/8" BSP thread for 1/8" pipe - £1.10 each
1/8" BSP thread for 3/16" pipe - £1.10 each
1/4" BSP thread for 1/4" pipe - £1.80 each
1/4" BSP thread for 5/16" pipe - £1.80 each
3/8" BSP thread for 3/8" pipe - £2.20 each