Grease Fitting Denotations
About Grease Fitting Denotations Glossary
- PTF Also known as PTF – SAE Short, American Standard Taper Thread
- NPTF American Standard Taper Pipe Thread for Dryseal Pressure
- NPT Same as PTF except full thread length is lengthened by one thread on the small end
- PTF - SPECIAL SHORT One full thread has been shortened from the large end of the thread
- PTF - SPECIAL EXTRA SHORT Two full threads have been shortened from the large end of the thread
- NPSM American National Standard Straight Pipe Thread for mechanical joints
- NPSI American National Dryseal Intermediate Internal Straight Pipe Thread
- NPSF American National Dryseal Fuel Internal Straight Pipe Thread
