Approved Source on DIBBS: What AMSC B, C and D Mean
Posted by FedOpp on Sep 27th 2026
Approved source on DIBBS means DLA buys that NSN only from specific manufacturers, and often only by a specific part number. If your shop is not one of those sources, you usually can't win by quoting your own version of the part. You either quote the approved part from the approved manufacturer, or you submit an Alternate Offer or Source Approval Request (SAR) and wait for DLA'
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