*BSP thread: British standard pipe thread1/4"BSP male thread OD≈12.7mm3/8"BSP male thread OD≈16mm1/2"BSP male thread OD≈20mm3/4"BSP male thread OD≈26mm1"BSP male thread OD≈33mm1/8"BSP internal thread inner diameter≈9mm1/4"BSP internal thread inner diameter≈12.7mm3/8"BSP internal thread inner diameter≈15mm1/2"BSP internal thread inner diameter≈19mm3/4"BSP inner thread inner diameter≈25mmExternal thread size: 1/4", 3/8", 1/2", 3/4", 1", 1.2" BSPInternal thread size: 1/8", 1/4", 3/8", 1/2", 3/4", 1" BSPFluid Type: Oil, Water, GasMaterial: BrassColor: GoldPackage Contents: 1 Piece Brass FittingsApplication: Pneumatic fittings, plumbing fittings, water pipe fittings, etc.