JIC Thread Archives - RYCO Hydraulics
Metal Seal Connectors – A better alternative to tapered threads

Machined faces were added to tapered pipe threads in an effort to address some of the shortcomings of pipe threads. A deep 30 degrees chamfer was added to the face of thread to form a seat. This is a modification that is only really seen in hydraulic products due to the high pressures involved. While a tapered pipe thread is still used, the thread no longer provides the sealing function. The thread now only provides the holding function, which is a fundamental change in its use. The machined face provides the following benefits: Easier orientation Better sealing No need for sealant The 30 degree machined face was first developed for the British pipe thread, BSP Thread. That way the advantages of the sealing on the machine seat are available in the America thread also. Metal Seal Pipe Thread Types British Pipe Threads: British Standard Pipe Taper (BSPT) British Standard Pipe Parallel (BSPP) American Pipe Threads: National Pipe Taper (NPT) Advantages of Metal Seal Pipe Threads These connectors have a greatly reduced leakage when compared with simple pipe threads. Disadvantages of ...

Metal seal hydraulic connectors and their uses

Metal seal connectors use profiled metal surfaces on the connector to form a seal. There are many different types of metal seal connectors, including JIC, DIN, BSPP and JIS, NPSM, and they are used across many industries. JIC Joint Industries Council Country of origin: USA Thread angle: 60 degrees (UNC / I-INF) Seat angle: 37 degrees JIC threads are parallel. The thread used is a unified thread, either course; I-INC, or fine; UNF. JIC are the most popular hydraulic connector form due to their versatility. They can connect to both hose and tube. When connecting to inch tube, it needs to be flared and a tube nut and sleeve, (RYCO part number S6), are required. Metric - DIN 2353 Deutsche Industrie Normen Country of origin: Germany Thread angle: 60 degrees (DIN 3853) Seat angle: 24 degrees They have a 24 degrees internal machined seat. These threads are becoming much more common worldwide. Like the JIC connector, there are DIN threads that can connect to both hose and tube. Unlike all other thread types, there are three sub-groups within the DIN ...