Multi-couplings
Quick release coupling UDK
Quick release couplings HP
Flat - face couplings FH
Brake line couplings BP
Screw-on type coupling HS
Screw-on type couplings HA
Pipeline couplings RS
Specials
Flow characteristics
Accessories
Technical information
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   US Thread Information
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Spare parts
   
 
US Thread Information  
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US Thread Information
 American national standard taper pipe threads (NPTF and NPSM)

To obtain the nominal dimension of an NPTF thread, place the threaded end on the appropriate circle and read the diameter.