parallel pipe thread - Thread & Engineering Standards

ISO Pipe Threads – G (Parallel) & R (Tapered) Threads

The ISO Pipe Thread Standard is internationally recognized and widely used in Europe, Asia, and other global markets for fluid, gas, and mechanical connections. It includes two main types of threads: ✔ ISO G Thread (Parallel – BSPP Equivalent) – Straight (parallel) threads requiring a sealing washer or O-ring for leak-proof connections.✔ ISO R Thread … Read more

NPS – National Pipe Straight Thread

The National Pipe Straight (NPS) thread is part of the American National Pipe Thread (NPT) family, but unlike NPT (which is tapered), NPS threads are parallel (straight). This means NPS threads do not provide a pressure-tight seal on their own and require sealing washers, O-rings, or gaskets to ensure a leak-proof connection. NPS is commonly … Read more