This requirement is for NSN 7R-4810-016740466-P8, TDP version 003, quantity 4 each, with delivery FOB origin. The item is flight critical and/or lacks adequate technical data for full and open competition, so Government source approval is required before contract award, and only previously approved sources have been solicited. If a prospective bidder is not an approved source, it must submit with its proposal the information required by the applicable NAVSUP WSS Source Approval Information Brochure and any documentation of a pending source approval request. Offers that fail to provide all required source approval data, or fail to document prior submission of that data, will not be considered for award. Because new-source approval normally cannot be completed in time to delay award, the Government may proceed based on Fleet support needs if approval requirements prevent timely acquisition.