MT Valves & Fittings product. Series 87 equal socket (hexagon interior) with male-female connection. Reinforced body made of yellow brass and union threads in accordance with ISO 228/1. Socket 87531 with threaded connection is designed to join valves or other threaded fittings. Operating temperature range from -20 to 150°C for figures without seals and from -20 to 100°C for figures with seals. MT’s threaded brass fittings are manufactured in accordance with the hot stamping method and in accordance with EN 1254-4. They are quick and easy to install, saving time and facilitating assembly. They have a high temperature resistance, which makes them ideal for fluid handling applications in cold water, hot water and compressed air, and are suitable for copper and plastic pipe systems (PE, PEX, PP, Pb). Available references and published specifications: • 87531015 — measures: M-F BRASS THREADED EQUAL SOCKET (HEXAGON INSIDE) 1/2"X1 CM; weight (kg): 0.04; small / large box: 10 / 220 Price and local availability on request. Source: https://mtspain.net/en/m-f-equal-socket-hexagion-inside-2/