The government is procuring 11 EA of a check valve (NSN 4820011974744), with delivery to DLA Distribution Anniston required 164 days after date of order. This is a source-controlled drawing item, and the approved source is 81833 7D2R-200000. The solicitation is an RFQ available via the provided link, and hard copies will not be issued. Supplied items must meet the requirements of the cited drawing, while digitized drawings and military specifications/standards may be retrieved or ordered electronically. All responsible sources may submit quotes electronically for timely consideration.