| Oklahoma Rig & Supply |
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| Parker Fluid Power | |
| Parker Hose Products Division | |
| Parker Brass Products Division | |
| Parker Coupling Division |
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| Parker Tube Fitting Division | |
| Parker Parflex Division | |
| Parker Fleet Products | |
| PECO Fasteners |
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| Precision Brand Products | |
| Precision Diamond Tool Company | |
| Prevost Corporation |
