This procurement is for 36 units of a flight-critical item with delivery FOB origin. Only sources previously approved by the Government are solicited; new sources must submit technical data per the NAVSUP WSS Source Approval Brochure, and award cannot be delayed pending new source approval. Offers lacking required source approval documentation will not be considered. The Government is not using commercial item acquisition procedures for this requirement. Interested parties may indicate capability, but award depends on meeting qualification requirements at time of award.