This Navy procurement is for nickel-copper alloy bar/hexagon material (QQ-N-281 Class A, cold drawn) used in a crucial shipboard system and designated Special Emphasis/Level I/SUBSAFE, requiring strict quality, traceability, certification, ultrasonic testing, and marking controls. It is a combined solicitation for multiple related CLINs, with awards reviewed and potentially made at the CLIN level to multiple vendors; evaluation will consider past performance, vendors may quote any or all CLINs, and quantity discounts for combined CLINs should not be included. The quantity for CLIN 0003AA is updated to 9, and delivery requires certification CDRLs on or before 20 days prior to scheduled delivery, PNSY review/acceptance 45 working days after receipt of DD 1423 CDRLs, and final material delivery within 365 days, with early/incremental delivery acceptable at no extra Government cost. The contractor must maintain an ISO-9001 quality system (or MIL-I-45208 alternate) with calibration controls, and there is no Government source inspection; inspection and acceptance will occur at destination/destination. Special Emphasis material requires a certificate of compliance and material certifications, and supplies are warranted for 365 days after acceptance.