MT Valves & Fittings product. Series 87 three-piece union nut with male-female threaded connection, conical seat and NBR seal. Reinforced body made of yellow brass. Nut 873412, with union threads in accordance with ISO 228/1, is designed to join valves or other 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: • 873412015 — measures: M-F THREE PCS BRASS STRAIGHT UNION TAPERED SEAT WITH O´RING; weight (kg): 0.1; small / large box: 10 / 130 • 873412020 — measures: M-F THREE PCS BRASS STRAIGHT UNION TAPERED SEAT WITH O´RING; weight (kg): 0.16; small / large box: 10 / 80 • 873412025 — measures: M-F THREE PCS BRASS STRAIGHT UNION TAPERED SEAT WITH O´RING; weight (kg): 0.25; small / large box: 5 / 50 • 873412032 — measures: M-F THREE PCS BRASS STRAIGHT UNION TAPERED SEAT WITH O´RING; weight (kg): 0.38; small / large box: 5 / 30 • 873412040 — measures: M-F THREE PCS BRASS STRAIGHT UNION TAPERED SEAT WITH O´RING; weight (kg): 0.53; small / large box: 5 / 20 • 873412050 — measures: M-F THREE PCS BRASS STRAIGHT UNION TAPERED SEAT WITH O´RING; weight (kg): 0.94; small / large box: 1 / 12 Price and local availability on request. Source: https://mtspain.net/en/m-f-straight-union-tapered-seat-with-nbr-o-ring/