This is a sole-source procurement for 5 units of a rupture disk assembly (NSN 7H-4820-016756159) to be delivered to DLA Distribution Norfolk, VA. The government does not own the data or rights to the part, and has determined it is uneconomical to purchase, reverse engineer, or otherwise acquire that data. Interested parties may obtain relevant military and federal specifications from DODSSP/ASSIST, though patterns and drawings are not stocked there. All responsible sources may identify their interest and capability, but award will only be made if the offeror, product, or manufacturer meets the qualification requirements at the time of award.