From transition nozzles, to grooved or tubed fittings, Mattsco carries a large inventory of carbon steel, stainless, and alloy fittings in a variety of sizes, schedules, and grades, both welded and seamless.

  • Butt Weld Fittings
  • Cast Fittings
  • Forged Fittings
  • Outlet Fittings

Sizes: 1/2” – 36” STD, XH

Schedules 20, STD, True 40, 60, XH, True 80, 100, 120, 160, XXH

Weld Fittings: LR 90’s, SR 90’s, 3R 90’s, Red 90’s, 45’s, Straight Tees, Reducing Tees, Concentric Reducers, Eccentric Reducers, Caps, LR & SR 180 Deg Return Bends


Carbon – A/SA234 WPB, A/SA234 WPC

Stainless – A/SA403, A/SA182, 304/304L, 316/316L

Low Temp – A/SA420 WPL6

Chrome – A/SA234 WP5, WP9, WP11 WP22, WP91

High Yield – MSS SP-75, A860 Y42-Y70

Transition Nozzles

Transition nozzles help save money otherwise spent on materials, consumables, and time spent welding, by essentially shortening the width of the header. Additionally, the can help to enable a smoother flow which can reduce the material’s rate of corrosion.

Sizes: 6″ – 14 “

Scheldure 80, 120, and 160




Low Temp