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Cast Stainless

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  • Stainless Cast Threaded Caps are stocked in sizes from 3/8" to 4".
  • Available in grades 304 and 316.
  • All Stainless Cast Threaded Caps have female NPT threads.
Sizes are Nominal Pipe Size (NPS) - size chart Five different Cast Stainless Caps
Two types of Cast Stainless Threaded Caps in different sizes and grades.

To start, select size. Follow the green box to refine selections as desired. Click “Lookup Product” any time after selecting size to display products matching criteria entered so far. Fields autofill when only one choice. Or use search box above.


Domestic - Made in the USA.

Import - Made elsewhere.


Class for pipe fittings is a standard defined by the ASME/ASTM. Though stated with a # sign, such as 150# or 3000#, it is not a direct pressure rating.  The pressure rating is dependent on material and temperature and is found by consulting an appropriate reference guide.


Material refers to the grade of stainless, either 304, 304L, 316 or 316L. The L designates "low carbon", making the fitting good for welding.


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