Feature： *Brand new and high quality *The pipe thread is also referred to as British Standard Pipe (BSP) thread, which is used in pipe installations in Europe. *The thread has a steeper and longer flank than the metric thread or NPT thread, with the flank angle measuring 55°, versus 60° for metric or NPT threads. A distinction is made between tapered (conical) and cylindrical versions of threads, with internal threads cylindrical and external threads conical. *Tapered (conical) threads according to DIN EN 10226-1 (old DIN 2999) are called "metallic sealing", because the nominal diameter of the tapered thread after a few revolutions corresponds to that of the counter thread. *During further tightening, the thread jams into each other and thus has a metallic sealing effect. Usually conical threads are provided with tape or hemp before screwing to fill the remaining gap. The positive effect of hemp is that it swells up on contact with liquid. *Cylindrical threads according to DIN ISO 228-1 are not self-sealing and therefore require appropriate sealing. Declaration of designations： All threaded fittings (tube thread) have conical tube outer thread AG(R) or cylindrical tube inner thread Rp(IG). We offer complete thread fittings "screw fitting". *If in a thread fitting the external thread (AG) on the 1 hand smaller than, or equal to, the internal thread (IG) or the external thread (AG) on the other hand, then designation "nipple" or "reducing nipple". *If, on the 1 hand, the external thread (AG) is larger than the internal thread (IG) on the other hand, then designation "reducer". *If in a thread fitting the internal thread (IG) on the 1 hand, equal to the internal thread (IG) on the other, then designation "socket". Details： *Material:Brass *Color:as shown *Connection size: 1/2inch=DN15，3/4inch=DN20 Package Contents: 1*Brass Valve Note: 1. The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness. 2. Please allow slight manual measurement deviation for the data.* Brand new and high quality The pipe thread is also referred to as British Standard Pipe (BSP) thread, which is used in pipe installations in Europe. The thread has a steeper and longer flank than the metric thread or NPT thread, with the flank angle measuring 55°, versus 60° for metric or NPT threads. A distinction is made between tapered (conical) and cylindrical versions of threads, with internal threads cylindrical and external threads conical. Tapered (conical) threads according to DIN EN 10226-1 (old DIN 2999) are called "metallic sealing", because the nominal diameter of the tapered thread after a few revolutions corresponds to that of the counter thread. During further tightening, the thread jams into each other and thus has a metallic sealing effect. Usually conical threads are provided with tape or hemp before screwing to fill the remaining gap. The positive effect of hemp is that it swells up on contact with liquid.