NSN Parts Manufacturers – Company Name Starts with O
- O & L Resources Inc. (23 parts)
- O & S Research Inc. (26 parts)
- O and M Mfg Co. (13 parts)
- O and S Acquistion LLC (60 parts)
- O Brien Corp., The (35 parts)
- O Brien Glen Movable Partition Co. (7 parts)
- O Brien Machinery Co., The (2 parts)
- O C M Machine Co. Inc. (16 parts)
- O C O Tool Co. Inc. (5 parts)
- O Conner Tanks LTD (3 parts)
- O Donnell Mfg Co. Inc. (1 part)
- O Fallon Machine and Tool Co. Inc. (6 parts)
- O G Supply Inc. (4 parts)
- O Gara Associates (1 part)
- O Hair P E and Co. (8 parts)
- O J S Services Inc. (12 parts)
- O K I Supply Co. (2 parts)
- O K Intl Inc. (181 parts)
- O K Machine and Tool Inc. (7 parts)
- O K Machinery Div. of Motter John C (19 parts)
- O K Tool & DIE Co. Inc. (14 parts)
- O K Tool Co. Inc. (6 parts)
- O K Tooling Co. (3 parts)
- O Keefe and Merritt Co. (1 part)
- O M Jones Inc. (8 parts)
- O Neil and Associates Inc. (1 part)
- O P S Inc. (4 parts)
- O Rings West Inc. (8 parts)
- O Sullivan Corp. (2 parts)
- O T S I (1968 parts)
- O W Landergren Inc. (7 parts)
- O X A Imaging Inc. (1 part)
- O'hara Metal Products (1 part)
- O-A Inc. (45 parts)
- O-Ring Division Europe (1636 parts)
- O-Rings Inc. (78 parts)
- O-Tech Mfg Co. Inc. (1 part)
- O-Two Medical Technologies Inc. (39 parts)
- O-Two Systems of America Inc. (12 parts)
- O-VIK Marina Var. O Snickeri (1 part)
- O-Z/Gedney Co. (258 parts)
- O. C. Keckley Company (411 parts)
- O. E. M. Controls Inc. (308 parts)
- O. F. Mossberg & Sons Incorporated (364 parts)
- O.C. Lugo Co. Inc., The (8 parts)
- O.K. Machine & Manufacturing Inc. (1 part)
- O.M.A.P. Officine Meccaniche Alta (1 part)
- O.R.M.A.G. Officina Riparazione (2 parts)
- O2 Corp. (3 parts)
- OAI Electronics Inc. (437 parts)
- Oak Crystal Inc. (343 parts)
- Oak Electric Motors Inc. (5 parts)
- Oak Friction Products Inc. (1 part)
- Oak Grigsby Inc. (4 parts)
- Oak Industries Inc. (7 parts)
- Oak Industries Inc. Switch Div. (12 parts)
- Oak Materials Group Inc. (4 parts)
- Oak Park Screw Products Co. (8 parts)
- Oak Ridge Tool - Engineering Inc. (2 parts)
- Oakdale Cotton Mills Inc. (2 parts)
- Oakdale Industrial Electronics Corp. (1 part)
- Oakes E A Co. (1 part)
- Oakford Mfg Co. (1 part)
- Oakite Products Inc. (1 part)
- Oakland Industries LTD (438 parts)
- Oakland Machine Works (4 parts)
- Oakland RIM and Wheel Inc. (17 parts)
- Oakleaf Inc. (45 parts)
- Oakley DIE and Mold Co. (1 part)
- Oaks Diversified Industries Inc. (1 part)
- OAL Spring Manufacturers (7 parts)
- OAO Corporation (4 parts)
- Oasis Construction (86 parts)
- Oasis Corp. (169 parts)
- Oasis Research Center Inc. (1 part)
- Oasys Technology LLC (32 parts)
- Oatey Co. (19 parts)
- OB/Masco Drapery Hardware Co. (3 parts)
- Obbco Safety Supply Inc. (7 parts)
- Obear and Sons Inc. (2 parts)
- Ober Industries Inc. (4 parts)
- Oberdorfer Foundries Inc. (311 parts)
- Oberdorfer Pumps Inc. (88 parts)
- Oberon USA Inc. (3 parts)
- Obol Enterprises (24 parts)
- Obreys Paint and Wallpaper (2 parts)
- Obrien Brass Company Inc. (3 parts)
- Obrien Dieselectric Corp. (6 parts)
- Obrien Gear Co. (82 parts)
- Obrisco Electronics Inc. (7 parts)
- Obryan Glass Corp. (17 parts)
- OBS Products Inc. (35 parts)
- Observa-Dome Laboratories Inc. (9 parts)
- Observation Technologies Inc. (2 parts)
- OBX Fire Tech (1 part)
- Occidental Chemical Corp. (24 parts)
- Occidental Circuits (1 part)
- Occo Mfg Corp. (14 parts)
- OCE Graphics USA Inc. (34 parts)
- OCE-Bruning Inc. (56 parts)
