From the notice

NSN 7R-3655-015238289-H1, TDP VER 001, QTY 101 EA, DELIVERY FOB ORIGIN. NSN 7RH 3655 015238289 H1, PN 3261151-0101, QTY 101 This part must be acquired from/repaired by a source(s)specified on a source control or selected item drawing as defined by thecurrent version of DoD-STD-100. Suitable technical data, Government data rights, or manufacturing/repair knowledge are not available to permit acquisition from/repair by other sources, nor qualification testing of another part, nor use of a second source part in the intended application. Although, by DoD-STD-100 definition, altered and selected items shall have an adequate technical data package, data review discloses that required data or data rights are not in Government possession and cannot be economically obtained. The subject item requires Government source approval prior to contract award, as the item is flight critical and/or the technical data available has not been determined adequate to support acquisition via full and open competition. Only the source(s) previously approved by the Government for this item have been solicited. The time required for approval of a new source is normally such that an award cannot be delayed pending approval of a new source. If you are not an approved source you must submit, together with your proposal, the information detailed in one of the NAVSUP Weapon Systems Support (NAVSUP WSS) Source Approval Information Brochures listed below.

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