National Pipe Taper Fuel (NPTF) threads are a U.S. standard for tapered threads used on pipes and fittings. A portable document format (PDF) file containing measurements related to these threads offers a readily accessible and standardized way to view and share this information. Such documents typically include tables specifying thread dimensions such as pitch diameter, major diameter, minor diameter, and thread length for various nominal pipe sizes.
Access to accurate thread specifications is crucial for engineers, machinists, and technicians involved in the design, manufacture, and assembly of fluid conveyance systems. Utilizing such a resource helps ensure proper sealing and prevent leaks in applications handling liquids or gases under pressure. The NPTF standard evolved from earlier pipe thread designs to provide a more leak-resistant connection without the need for additional sealant in many applications. Its widespread adoption facilitates interoperability between components from different manufacturers.