Using the Request for Quote (RFQ) form provided on this page, you can request competitive procurement options on part number NO PRIMARY REF 99-056-3751 with rapid responses always offered by our staff. To ensure that you locate and procure exactly what you need with ease, we list parts with as much information as we can. For example, part number NO PRIMARY REF 99-056-3751 It is listed as Seal Plain. component manufactured by The Design Control Authority, specifically under CAGE Code IREF0. It is also accompanied by the NSN 5330990563751 for ease of organization, the first digits of the NSN indicating that the part belongs to FSC 5330 Packing and Gasket Materials.