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{Parallel Thread} Both ends of this brass pipe nipple feature 1/2‑inch BSPP (British Standard Parallel Pipe) threads, specifically designed to work with sealing washers or O‑rings for a reliable leak‑free connection. Provides precise positioning and easy disassembly without damaging the fitting. {Extended Length} This brass male threaded nipple has a total length of 50mm, offering extra reach for connections. The longer body allows you to bridge gaps between two fixed points, reducing the need for multiple couplings in series and eliminating additional potential leak points. {Compatibility} With a nominal diameter of DN15 and an outer diameter of approximately 20mm, this nipple is fully compatible with all standard 1/2‑inch BSP female threaded fittings – including couplers, elbows, tees, valves, and flanges. The universal size ensures integration into existing systems without adapters or custom parts. {Solid Brass} Made of high‑quality brass, offering excellent corrosion resistance, dezincification resistance, and mechanical strength. The brass body delivers long‑term reliability in both indoor and outdoor installations. The iron‑free composition also makes it safe for drinking water applications, complying with standard plumbing regulations. {Wide Application} Suitable for water, air, oil, and heating systems. Can be used in domestic water supply lines, central heating radiators, compressed air networks, low‑pressure hydraulic circuits, and even fuel oil systems.