United States Fittings manufactures custom carbon steel stub ends. We offer MSS-A (Short Pattern), MSS-C and ASA-A stub ends in all wall thicknesses including Schedules 5 and 10.

Carbon Steel Stub Ends are manufactured from A106 grade B seamless pipe with Ring and Barrel Construction, per ANSI B16.9 dimensions. The ASTM Fittings Specification is WPB W, welded with no Radiograph of the weld, and they are available in sizes 2″ thru 24″ and in standard and heavy wall thickness.

Seamless stub ends are manufactured from A519/A106 hot rolled seamless to meet ASTM Fitting Specification A234WPB. ASA-A (Long Pattern) stub ends are available in size 1/2″ thru 4″ and in all wall thicknesses. MSS-A (Short Pattern) stub ends are available in sizes 1/2″ thru 6″ and in all wall thicknesses. Type B and Special length threaded stub ends are available upon request. We offer domestic fittings manufactured in our shop located in Northeast Ohio.

Custom Stub End Flange Pipe Fitting

Materials: Carbon Steel: A 106 Grade B Seamless

Carbon Steel: A 519/A 106 Hot Rolled Seamless

Sizes: 1/2” thru 24”

Schedules: All Schedules

End Prep:

  • Beveled Ends
  • Squared Ends
  • Flanged Ends
  • Grooved Ends
  • Threaded Ends (Male Only)


  • ASA-A Standard
  • MSS-A and other special lengths available
Custom Carbon Steel Stub End Pipe Fitting

Send us your project details for a same-day quote!

Lap Joint Stub End Manufacturer