The government is procuring 8 check valves (NSN 4820010157477), with delivery to W1A8 DLA Distribution required within 48 days after date of order. This is a source-controlled drawing item; the approved source is 51663 RG44210A, and furnished items must meet the cited drawing requirements. The solicitation is an RFQ available via the provided link, with no hard copies available; digitized drawings and military specifications/standards may be retrieved or ordered electronically. All responsible sources may submit an electronic quote, which will be considered if timely received.