Founded in Millersburg in 1881, Alvord-Polk makes standard and custom cutting tools, with a particular reputation for aircraft-quality reamers manufactured in the United States. The company has grown through acquisitions into a multi-facility operation that also includes aerospace fastener and specialty manufacturing, while its Alvord-Polk Tool division continues to build tools to national aerospace specifications. Its quality system was confirmed compliant with ISO 9001:2015 in 2024.
ISO 9001:2015
Allied Machine & Engineering CorpFounded in 1941 by Harold E. Stokey, Allied Machine & Engineering Corp. makes precision holemaking and finishing cutting-tool systems for metal-cutting industries from its base in Dover, Ohio. Still family-owned, the company is now led by the Stokey family’s second and third generations and supports customers worldwide through its engineering-driven manufacturing operations. Allied has been registered to ISO 9001 since 1998 and currently holds ISO 9001:2015 certification.DOVER, OH
U.S. Air Tool Company, LLC (USATCO)Family-owned USATCO traces its roots to Joseph Percz’s 1951 basement operation repairing surplus aircraft tooling. Based in Ronkonkoma, New York, the company now serves aviation professionals worldwide while retaining a specialty in aircraft tooling and support for the homebuilt-aircraft community it has served since the 1970s. USATCO holds ISO 9001:2015 certification.RONKONKOMA, NY
West Ohio Tool CoBorn in a Russells Point garage in 1989, West Ohio Tool Co. now manufactures custom carbide, PCD and CBN cutting tools for demanding work across automotive, aerospace and other mission-critical industries. The family-founded company is best known for its EDGEX4® PCD-brazed drilling solution, developed through years of testing and demonstrated to reach up to one million holes in die-cast aluminum. Its 20,000-square-foot operation combines hands-on engineering support with automated grinding and erosion equipment, and operates under ISO 9001:2015 and AS9100 certification.RUSSELLS POINT, OH
Aircraft Missile Parts Manufacturing (AMPM)Since its founding in California in 1976, Aircraft Missile Parts Manufacturing (AMPM) has made aerospace fasteners, now producing specialty parts from its Millersburg, Pennsylvania facility. The company supplies standard and custom fasteners to aerospace and commercial customers worldwide, with threaded taper pins among its longstanding specialties. AMPM is ISO 9001:2008 certified and manufactures in the USA.MILLERSBURG, PA