About Penn Machine

In April of 2020 Western Forge & Flange announced that Wynnchurch Capital, L.P. (“Wynnchurch”) had acquired the company’s assets and would be uniting the specialty forge company with Pennsylvania Machine Works (“Penn Machine”) under one platform. Both companies have a long history of industry-leading flanges, forgings, and fittings. Penn Machine excels in manufacturing high pressure forged fittings and branch connections that are sold into downstream oil and gas, petrochemical, LNG, industrial and shipbuilding end markets. For more information visit: pennusa.com or become familiar with their product line and material grade capabilities listed below.

Penn Machine Fittings


  • Concentric
  • Eccentric
  • Split Schedules
  • Special Lengths


  • Socket Weld
  • Threaded
  • Combination (SW / Threaded)


  • O Ring Unions
  • Orifice Unions
  • Insulating Unions

Union Elbows

  • Male Threaded
  • Female Threaded


  • Butt Weld
  • Eccentric (Socket Weld/Threaded)


  • Bull Plugs
  • Special Length
  • Counter Sunk
  • Radiograph Plugs


  • Socket x Thread
  • Butt Weld x Thread
  • Male x Female Adapters
  • OD Tube Adapters

Reducing Fittings

  • Tees - Socket x Thread
  • 90's - Socket x Thread
  • Bull Head Tees
  • Butt Weld Tees
  • Male Thread - Tees, 90's


  • Seamless
  • Welded
  • Male x Female Adapters
  • OD Tube Adapters


  • Left Hand
  • Straight
    • NPTF (Dry Seal)
    • NPSC
    • NPTM
    • NGT (Gas Taper)
  • British Standard
    • Taper
    • Parallel
  • Metric
  • JIS
  • SAE


  • Flange Outlet
  • Sweep Outlet
  • Insert Outlet

Special Fittings

  • Thermowells
  • Nozzles

Penn Machine Material Grades

Listed are some of the available grades. Additional alloys available on request.

Carbon Steels

A105: Galvanized, Normalized, Plus A694- F42; F52; F60; F65; F70 A105N-HF, A106B, WPB, LF2, LF3, A181

Stainless Steels

304/304L, 316/316L, 309, 310, 317L, 321/H, 347/H, AL6XN (N08367), F44 (254SMO), F51 (2205), F53 (2507), F55, 405, 410, F6A, A904L (N08904), Alloy 20 (N08020)

Nickel Alloys

A400 (N04400), A200 (N02200), A201 (N02201), A800 (N08800), A800H (N08810), A800HT (N08811), A825 (N08825), A600 (N06600), A625 (N06625), A925, C276 (N10276), C-22® (N06022), C2000, B2 (N10665), B3, G30, Nitronic 60

Chrome Moly Alloys

F11, F22, F5, F9, F91, F92


Grade 1, Grade 2, Grade 3, Grade 4

Aluminum Alloys

6061, 5083, 5086

Copper Nickel

70/30, 90/10

Penn Machine tooling device
Penn Machine Line Card


We comply with all of the certifications needed for your industry.