This procurement is for a flight-critical item requiring Government source approval prior to award, and only previously approved sources have been solicited. New sources must submit detailed technical information as outlined in the NAVSUP WSS Source Approval Brochure, and offers lacking all required data will not be considered. Because approval normally takes longer than the procurement timeline, award cannot be delayed for pending source approvals, and the requirement may proceed based on fleet support needs. Interested parties can obtain relevant specifications and standards through the DODSSP or ASSIST-Online, though patterns and drawings are not stocked there. The Government is not using commercial item acquisition policies, but interested parties may express their capability to supply a commercial item within 15 days of this notice.