This solicitation is for the furnishing of a pressure regulator, NIIN 016554808, part number 4016AS241-1, with a quantity of 12 each. Offerors must be an approved source or submit the required source approval information with their proposal; failure to do so will result in non-consideration for award. The items require government source approval prior to award, and award may be continued based on fleet support needs if approval cannot be processed in time. Early and incremental deliveries are accepted and preferred. The warranty for supplies of noncomplex nature is 12 months, with claims to be made within 60 days after discovery of defect.