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Stainless Steel 304 Cast Pipe Fitting, Hex Locknut, Class 150, NPT Female

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Product Specifications
Item Shape
Specification Met
ISO 49 ANSI B1.20.1
Material Type
Stainless Steel
Pressure Rating Class
Style Name
System of Measurement

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Key Features

  • Hex locknut locks two threaded fittings into place for stability and reduced vibrations
  • Female National Pipe Taper (NPT) threads for use with male threaded pipes and fittings
  • Made of stainless steel 304 for greater strength than 302 grade steel
  • Low carbon content to ensure greater resistance to corrosion
  • Meets standards ANSI B1.20.1 and ISO 49 for quality assurance

Product Description

The Merit Brass hex locknut is a class 150 stainless steel 304 cast pipe fitting with female National Pipe Taper (NPT) threads for locking two fittings into place for stability and reduced vibrations. The locknut has NPT threads for creating tighter seals than straight threads. The hexagonal shape provides increased leverage for use with a wrench during installation and disassembly. Made of stainless steel 304, the lower carbon content of this locknut ensures higher corrosion resistance than 302 grade steel. This class 150 fitting meets steel 304 strength standards and specifications ISO 49 and ANSI 1.20.1 for quality assurance. Class is a standard relating to tolerance, construction, dimension, and wall thickness, but it is not a direct measurement of maximum working pressure.

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).

Merit Brass manufactures pipe nipples following ISO 9001 standards for quality assurance. Family-owned since 1937, the company is based in Cleveland, OH. Merit Brass distributes pipe fittings to the United States and Canada.

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