Founded in 1991 as a small job shop in Lebanon, Ohio, family-owned and -operated K&K Precision now provides custom precision machining and manufacturing from its Mason facility. The company employs more than 55 Ohioans, supports aerospace and defense work through ISO 9001:2015 certification and ITAR registration, and offers 24-hour manufacturing by request. Its planned expansion will increase the plant from 28,000 to 60,000 square feet by 2027.
ISO 9001:2015
certification
ITAR Registered
registration
Center-Line Machining LLCFamily-owned and operated since 2007, Center-Line Machining produces custom precision-machined components from its Mentor, Ohio shop. Its experienced machinists, engineers, and programmers handle projects from prototype through production, with in-house CNC turning and milling supported by detailed inspection and approved outside services. Center-Line is ITAR compliant, ISO 9001:2015 compliant, and AS9100D compliant.MENTOR, OH
Hofacker Precision MachiningSince 1997, Hofacker Precision Machining has produced tight-tolerance components for aerospace, defense, and commercial customers from its shop near Dayton, Ohio. Its craftsmen average more than 20 years of experience, and the company is known for clear communication and the ability to respond when urgent work threatens a customer’s production line. Hofacker operates under AS9100D and ISO 9001:2015 certification and is registered for ITAR work.CLAYTON, OH
Firstar Precision CorporationFounded in Brunswick, Ohio, in 2000, Firstar Precision makes precision CNC-machined components and manages projects from product development through delivery. The company began with five employees in a 2,500-square-foot shop and now operates from a 27,000-square-foot facility, taking on complex jobs that other machine shops may pass by. Firstar became 100% employee-owned in 2021 and is an ISO 9001:2015-certified American manufacturer with CMMC Level 2, ITAR registration, and Joint Certification Program approval.BRUNSWICK, OH
Ohio Screw Products, Inc. (OSP)Since 1945, Ohio Screw Products has grown from H. A. Hewitt’s small screw-machine shop into a 100% employee-owned manufacturer in Elyria. Its employee-owner culture shapes a precision machining operation known for handling demanding, high-volume work while preserving traditional machining know-how. ISO 9001:2015 certification and ITAR registration support its long-standing work for customers in aerospace, defense, and other regulated industries.ELYRIA, OH