IMPORTANT SIZING NOTE - Most plumbing products are measured using BSP thread dimensions which measure 1/4 inch larger than that stated, therefore this 1/2 Inch BSP thread actually measures 3/4 Inch in diameter. If your thread measures 1/2 Inch in diameter then you require the 1/4 Inch version of this product brass pipe fittings threaded nipple nipple fittings threaded nipple fitting, Weight: 0.1322773572 Pounds, Manufacturer: Primaflow