Precision Brass & Aluminum Turned Parts — Proudly Made by R.F. Mau Since 1936 Founded in 1936  and located in Lincolnwood, Illinois , R.F. Mau  has been manufacturing precision-turned components in the United States for nearly a century. As companies continue to prioritize reliability, quality, and supply-chain stability in 2026, more organizations are turning to trusted U.S. manufacturers like R.F. Mau for dependable production and long-term partnership. We specialize in pro