EXHIBIT 21 ---------- MINE SAFETY APPLIANCES COMPANY ------------------------------ The registrant's present affiliates include the following: State or Other Jurisdiction of Name Incorporation ---- --------------- MSA (Aust.) Pty. Limited Australia MSA Export Limited Barbados MSA do Brasil Ltda. Brazil MSA Canada Canada MSA de Chile Ltda. Chile Baseline Industries, Inc. Colorado MSA International, Inc. Delaware MSA de France France Auergesellschaft GmbH Germany MSA/Auer Safety Technology Hungary MSA Italiana S.p.A. Italy MSA Japan Ltd. Japan MSA de Mexico, S.A. de C.V. Mexico MSA Nederland, B.V. Netherlands HAZCO Services, Inc. Ohio MSA del Peru S.A. Peru MSA (Britain) Limited Scotland MSA S.E. Asia Pte. Ltd. Singapore MSA Espanola S.A. Spain AB Tegma Sweden MSA (Switzerland) Ltd. Switzerland Safety Supply Specialists, Inc. Wisconsin MSA Zimbabwe (Pvt.) Limited Zimbabwe - ------------------------------------------------------- The above-mentioned affiliated companies are included in the consolidated financial statements of the registrant filed as part of this annual report. The names of certain other affiliates, which considered in the aggregate as a single affiliate would not constitute a significant affiliate, have been omitted.