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Cast Stainless

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  • Cast Stainless Couplings are stocked in sizes from 1/4" to 6".
  • Available in grades 304 and 316.
  • Both Threaded Full and Half Cast Stainless Couplings are in stock.

Five different Cast Stainless Couplings Sizes are Nominal Pipe Size (NPS) - size chart
Three different sizes of Cast Stainless Couplings.

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 anywhere else


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.


Threaded couplings go on threaded pipe. Socket Weld couplings go on plain end pipe.


Full couplings are intended to join two pieces of pipe together. Half couplings are used to make a branch connection instead of using a sockolet or thredolet.


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