DERNORD Pipe Fittings are NPT type. Dernord Pipe Fittings are NPT type. The Tri-Clamp x Female NPT Adapter, which provides a secure, rust-resistant solution for simple conversions and hose adaptions. All Tri-Clamp x Female NPT Adapters are composed of long-lasting stainless steel 304.

Determining NPT/NPS Size:

To distinguish between NPT and NPS is based on the nominal pipe diameter, not the outside diameter (OD) of the threads. For example: A 1/2" NPT male fitting has an outside thread diameter of approximately 3/4", but as stated the correct NPT size is 1/2", including the counterpart female.

While NPT and NPS threads may be joined together, their threads may not form a proper seal, or not be an optimal connection.