Proposed procurement for NSN 4820011306521 VALVE,CHECK: Line 0001 Qty 5 UI EA Deliver To: W1A8 DLA DISTRIBUTION By: 0197 DAYS ADO Approved source is 16780 54497. The solicitation is an RFQ and will be... Proposed procurement for NSN 4820011306521 VALVE,CHECK: Line 0001 Qty 5 UI EA Deliver To: W1A8 DLA DISTRIBUTION By: 0197 DAYS ADO Approved source is 16780 54497. The solicitation is an RFQ and will be available at the link provided in this notice. Hard copies of this solicitation are not available. Specifications, plans, or drawings are not available. All responsible sources may submit a quote which, if timely received, shall be considered. Quotes must be submitted electronically.