Exhibit 21
SUBSIDIARIES OF PRECISION CASTPARTS CORP.
State or
Jurisdiction
of
Approximate Incorporation
Percentage of Voting or
Name of Subsidiary Securities Owned Organization
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PCC Structurals, Inc. 100% Oregon
Precision Castparts Corp. France, S.a.r.l. 100% France
PCC Airfoils, LLC 100% Ohio
AETC Limited 100% United Kingdom
PCC Flow Technologies Holdings, Inc. 100% Delaware
CW Valves Services Co. 100% Texas
AOP Industries, Inc. 100% Oklahoma
PCC Flow Technologies (Wuxi) Co., Ltd. 100% China
PCC Flow Technologies LP 100% Delaware
PCC Valves & Controls, Inc (formerly TBV) 100% Delaware
Environment-One Corporation 100% New York
PCC Flow Technologies (Switzerland) AG 100% Switzerland
Technova GmbH 100% Germany
PCC Ball Valves S.r.l. 100% Italy
Otto Vogeli Industriearmaturen GmbH 100% Germany
PCC Flow Technologies Limited 100% United Kingdom
PCC Specialty Products, Inc. 100% Delaware
J&L Fiber Services, Inc. 100% Wisconsin
Advanced Forming Technology, Inc. 100% Colorado
Wyman-Gordon Company 100% Massachusetts
Wyman-Gordon de Mexico S. de R.L. de C.V. 100% Mexico
Precision Founders, Inc. 100% California
Precision Castparts CZ s.r.o. 100% Czech Republic
Wyman Gordon (Cleveland), Inc. 100% Ohio
Cypress Extrusion Press Corporation 100% Delaware
Wyman-Gordon Limited 100% United Kingdom
Wyman-Gordon Forgings LP 100% Delaware
Wyman-Gordon s.r.o. 100% Czech Republic
Western Australian Specialty Alloys, Pty. Ltd. 100% Australia
Wyman-Gordon Investment Castings, Inc. 100% Delaware
STW Composites, Inc. 100% Delaware
Wyman-Gordon Washington Street, LLC 100% Delaware
Precision Receivables Corp. 100% Oregon
PCC Luxembourg Holdings LLC 100% Delaware
PCC Luxembourge Holdings SCS 100% Luxembourg
PCC Wouter Witzel Ltd. 100% United Kingdom
PCC Wouter Witzel Holding B.V. 100% Netherlands
PCC Euro Automation Centre B.V. 100% Netherlands
PCC Airfoils S.A. de C.V. 100% Mexico
PCC Sterom S.A. 97.8% Romania
PCC Flow Technologies Australia Pty Ltd. 100% Australia
PCC Composites, inc. 100% Colorado
AFT Europa-Advanced Forming Technologies Ltd. 100% Hungary
FRISA Wyman-Gordon, S.A. de C.V. 100% Mexico
SPS Technologies, LLC 100% Pennsylvania
M. Argueso & Company, LLC 100% Delaware
The Arnold Engineering Co. 100% Illinois
Arnold Investments, Ltd 100% Delaware
Arnold Magnetics Limited 100% Hong Kong
Arnold Magnetics Asia Ltd 100% Hong Kong
Arnold Magnetics (Shenzhen) Limited 100% China
NAM Acquisition Corp I & II 100% Delaware
National Arnold Magnetics 100% California
Jade Magnetics Limited 100% British Virgin
Isles
Flexmag Industries, Inc 100% Ohio
Greer Stop Nut, Inc. 100% Tennessee
Magnetics Technologies Corporation 100% Delaware
Magnetics Technology Europe Limited 100% United Kingdom
SPS Technologies Foreign Sales Corp. 100% Barbados
Unbrako LLC 100% Delaware
Unbrako Mexicana SRL de C.V. 100% Mexico
SPS International Investment Co 100% Delaware
Unbrako, Inc. 100% Delaware
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Greenville Metals, Inc. 100% Pennsylvania
Metalac Fasteners, Inc. 100% Illinois
SPS Technologies Waterford Company 100% Michigan
Magnetstuff.com, Inc. 100% Illinois
Howell Penncraft, Inc. 100% Delaware
Cannon-Muskegon Corporation 100% Michigan
Non-Ferrous Bolt & Manufacturing Co 100% Nevada
Avibank Mfg., Inc 100% Delaware
NSS Technologies, Inc. 100% Michigan
Standco Canada, Ltd 100% Canada
SPS/Unbrako K.K. 100% Japan
Metalac SPS Industria e Comercio, Ltda 100% Brazil
Metalac S/A Industria e Comercio 100% Brazil
Mecair Aerospace Industries, Inc. 100% Canada
Unbrako Schrauben, GmbH 100% Germany
SPS Asia Ltd. 100% Hong Kong
SPS International, S.a.R.L. 100% Luxembourg
S.P.S. International Limited 100% Ireland
SPS Hi-Tek, Ltd 100% Ireland
S.M.T., Ltd 100% Ireland
Mohawk Ueopa, Ltd 100% Ireland
Mohawk Cutting Tools Sales, Ltd 100% United Kingdom
Melcut Tools, Ltd 100% Ireland
Melcut Tools, Inc. 100% South Carolina
SPS Technologies France, S.a.R.L. 100% France
SPS Aerostructures France SAS 100% France
Hi-Life Tools France, E.U.R.L. 100% France
Hi-Life ULMA, Srl 100% Italy
Unrako Products (Singapore), Ltd. 100% Singapore
SPS Technologies Trading Pte., Ltd 100% Singapore
Unrako Pty., Ltd. 100% Australia
SPS Malta Limited 100% Malta
SPS Pacific Limited 100% Malta
SPS Technologies Limited 100% United Kingdom
Hi-Life Tools (UK) Limited 100% United Kingdom
Swift Levick Magnets Limited 100% United Kingdom
SPS Tech Training Limited 100% United Kingdom
T.J. Brooks, Ltd. 100% United Kingdom
SPS Chevron Limited 100% United Kingdom
SPS Biao Wu High Tensile Fasteners Company, Ltd. 85% China
FRISA Wyman-Gordon LLC 51% Delaware
Oregon Plasma 50% Oregon
Kadimi Tool Mfg. Co. PVT LTD 50% India
Wyman-Gordon EG S. de R.L. de C.V. 50.1% Mexico
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