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