The government is procuring 48 check valves (NSN 4820003695097), to be delivered to DLA Distribution Depot Hill within 56 days after order. Approved sources are 06239 H625-20-052, 93835 69800, and 93835 6980021. This is an RFQ available via the provided link; hard copies, specifications, plans, and drawings are not available. All responsible sources may submit quotes, which must be submitted electronically.