This class 125 cap is a brass pipe fitting with female National Pipe Taper (NPT) threads for closing and terminating male pipe ends. It fits over the outside of the fitting or pipe it is closing and has NPT threads for cr...

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This class 125 cap is a brass pipe fitting with female National Pipe Taper (NPT) threads for closing and terminating male pipe ends. It fits over the outside of the fitting or pipe it is closing and has NPT threads for creating a tighter seal than straight threads. The class 125 fitting is made from brass, which is more economical, machinable, and offers greater corrosion resistance than steel. Class is a standard relating to tolerance, construction, dimension, and wall thickness, but it is not a direct measurement of maximum working pressure. This fitting meets standards ANSI/ASME B16.15, ASME B1.20.1, ASTM B584, and ALLOY C83600 for quality assurance.

Pipe fittings are components used for connecting, terminating, controlling flow, and changing the direction of piping in many different industries. When purchasing pipe fittings, consider the application, as this will affect material type, shape, size and required durability. Fittings are available threaded or unthreaded, in many shapes, styles, sizes, and schedules (pipe wall thickness).



  • These fittings contain lead and are not allowed by federal law to be installed for potable water use in the U.S.A. and its territories.
  • Female National Pipe Taper (NPT) threads for fitting to male pipes or fittings
  • Made from brass for machinability and higher corrosion resistance than steel
  • NPT thread for compatibility with a range of threads
  • More economical than steel
  • These fittings contain lead and are not allowed by federal law to be installed for potable water use in the U.S.A. and its territories.
  • Female National Pipe Taper (NPT) threads for fitting to male pipes or fittings
  • Made from brass for machinability and higher corrosion resistance than steel
  • NPT thread for compatibility with a range of threads
  • More economical than steel

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