The government seeks to procure 7 EA of a check valve, NSN 4820010157477, as a source-controlled drawing item with approved source 51663 RG44210A. Delivery is required to W1A8 DLA Distribution by 168 days ADO. The solicitation is an RFQ available via the provided link, and hard copies are not available. Furnished items must meet the cited drawing requirements, and digitized drawings and military specifications/standards may be retrieved or ordered electronically. All responsible sources may submit electronic quotes, which will be considered if timely received.