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NPTF abbr.stresses
oil внутренняя нормальная коническая трубная резьба (США; national pipe thread, female)
 English thesaurus
NPTF abbr.
abbr. tight joints
abbr., alum. American National Taper Pipe Threads for Dry Seal Pressure Tight Joints
abbr., auto. National Pipe Thread Fine
abbr., oil national pipe thread, female; National Pipe Tapered Fuel (Johnny Bravo); American National Pipe Thread Female
tech. nuclear proof test facility
tech., abbr. female; national pipe thread