UNN - solder type nut and nipple

Solder type nut and nipple pipe ends supplied in sets (one nut, one nipple) in various sizes: 1/8" BSP for 1/8" or 3/16" pipe, 7/16" x 19 TPI for 3/16" pipe, 1/4" BSP for 1/4" or 5/16" pipe, 3/8" BSP for 3/8" pipe, 1/2" BSP for 1/2" pipe.