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Stainless Buttweld

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  • Stainless Buttweld Caps conform to ASTM A403.
  • Stocked in sizes from 1" to 6".
  • Available in grades 304L and 316L (L=low carbon).

Five different sizes of Stainless Buttweld Caps
Sizes are Nominal Pipe Size (NPS) - size chart
Two different sizes of Stainless Buttweld Caps.

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.


Schedule refers to the pipe thickness on which this fitting is to be used, typically values are STD (standard), S/10 (Schedule 10) and XH (extra heavy). These thickness vary with the diameter of the pipe according to published standards.


Domestic - Made in the USA.

Import - Made elsewhere.


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