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QPL Listed Compounds
Qualified Products List (QPL) listed compounds are compounds for which a manufacturer has received approval to sell to a certain specification. Each compound must complete rigorous independent laboratory testing to receive approval. The Aerospace and Defense industry buys product from only QPL-listed suppliers. The QPL list is maintained by Performance Review Institute (PRI) and the Wright-Patterson Air Force Base Material Laboratory.
| Drawing | Material Specification | Parco Compound | Most Recent Approval | Approval Date |
| AS3209 AMS-R-83248/1 | AMS7276 | 9009-75 | PRI Approval Letter #246 | 12/19/2007 |
| AS3209 AMS-R-83248/1 | AMS7276 | 9266-75 | PRI Approval Letter #0185 | 11/27/2006 |
| AS3209 AMS-R-83248/2 | AMS7259 | 9009-90 | PRI Approval Letter #245 | 12/19/2007 |
AMS-P-83461/1 | AMS-P-83461 | 4367-70 | PRI Approval Letter #248 | 12/19/2007 |
| AMS-P-83461/2 | AMS-P-83461 | 4367-70 | PRI Approval Letter #248 | 12/19/2007 |
| AS28775 | MIL-P-25732 | 4067-70 | AFML/MX 79-69 | 3/31/1994 |
| AS28778 | AMS-P-5510 | 4081-90 | AFRL/MLSA Approval Letter | 8/2/2005 |
| AS29512 | AMS-P-5315 | 0457-60 | PRI Approval Letter #107 | 1/6/2005 |
| AS29512 | AMS-P-5315 | 4457-65 | PRI Approval Letter #247 | 12/19/2007 |
| AS29513 | AMS-P-5315 | 0457-60 | PRI Approval Letter #107 | 1/6/2005 |
| AS29513 | AMS-P-5315 | 4457-65 | PRI Approval Letter #247 | 12/19/2007 |

