24 inch Long Aluminium Pipe with 1/2 inch NPT Male Threaded Ends The RAM-PA8224 is a 24 inch long rigid aluminium pipe that has a 1/2 inch NPT male thread at both ends of the pipe. Material: Powder Coated Marine Grade Aluminium NPT (National Pipe Thread) is a standard used in joining pipes and fittings that have a tapered thread. As a general rule, the NPT inch size is the inside diameter of the threaded pipe and is known as the NPS (Nominal Pipe Size).
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