Master Bolt, LLC began in 1984 making a single railroad bolt and has since built its identity around solving specialized hardware needs from its Elyria shop. Today, the company makes custom industrial fasteners for customers across the United States and ships worldwide, with in-house tooling that supports unusual specifications and applications.
AAR Certified
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NYCTA Specifications
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IFI Specifications
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ISO 9001
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Nadcap Approved Heat Treat Vendor
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Kelko Products CompanyFor more than three decades, Lorain-based Kelko Products Company has manufactured custom fasteners, double-end stud bolts, and CNC-turned components for demanding industrial applications. The company combines automatic screw machines and custom threading equipment with in-house machining and finishing, and handles everything from single prototypes to runs of 10,000 parts. Kelko serves customers across the United States and Canada, with quality inspections throughout production and documentation available for materials, testing, and specified standards.SANDUSKY, OH
Fasteners Unlimited, IncSince 1985, Fasteners Unlimited has been a western Pennsylvania manufacturer known for precision work on specialty machined hardware. Its full CNC shop serves demanding industrial customers, while an in-house testing lab helps verify that parts meet specifications. The company manufactures in the USA and accepts orders of any size.WARRENDALE, PA
MPT Fastener CorporationFounded in May 1992 by Bill Armstrong Sr. and his son, MPT Fastener Corporation supplies fasteners and electronic hardware, with a particular focus on hard-to-find and specialty parts. The Macedonia, Ohio, company serves subcontractors and manufacturers with items made to customer requirements, including parts for medical-device applications. MPT became incorporated in 1996 while retaining its original emphasis on serving customers of every size.MACEDONIA, OH
The Auto Bolt CompanyFounded in 1948, The Auto Bolt Company has been family owned and operated since 1996, building its identity around more than seven decades of bolt-making in Cleveland. Its 70-plus employees work from a 130,000-square-foot facility to produce American-made cold-heading fasteners, with engineering support for customers who need parts made to a print rather than selected from a catalog. ISO 9001:2015 certification and an onsite quality lab support its work for industrial customers.CLEVELAND, OH