- Accurate Threaded Products
- Accurounds
- American Products
- Appleton Electric (EGS)
- Arland Tool and Die
- Army Research Lab Natick
- Avaya Communications
- Bechdon Company
- Bethleham Steel Corp
- B. F. Goodrich
- Boston Centerless
- Brooks Instruments
- Bulova
- Cambridge Filter Corp.
- Chalmers & Kubeck
- Chromalloy
- Clearing Niagara
- CSC
- Cumberland Engineering
- Gillette
- Grumman Data Systems
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- Harsco-Track
- International Equipment Corp.
- Double E
- Eaton Corp.
- Egan Davis-Standard
- Elliott Company
- FerroTec China
- GP & G
- G. S. Precision, Inc.
- General Electric Co.
- General Dynamics Electric Boat
- Jarvis Airfoil Inc.
- Jarvis Surgical
- Kaman Aerospace
- Keller Technology Corp.
- Kidde-Fenwal
- Kinney Vacuum
- Long Agribusiness
- Lucent Technologies
- Mar-Lee Mold
- Mason & Hanger
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- Matco Precision
- Northrop Grumman
- Northwest Airlines
- OSRAM Sylvania
- Palmer Manufacturing Co.
- P&H Harnischfeger
- Pratt & Whitney
- Riverside Cycle Machine
- Sandor Tool
- Strippit/LVD, Inc.
- TACR
- T. G. Faria
- T. D. Williamson
- TK Valve
- Tobyhanna Army Depot
- Tucker Engineering
- Tuthill Vacuum
- Valeo
- Ward Machinery
- Wardwell Braiding Machine
- Webster Valve
- Winco, Inc.
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