DLMS™ Summary National Stock Number 1005-00-630-5683 National Stock Number (NSN) 1005-00-630-5683, or NIIN 006305683, (spring assy,20mm bo) has an unknown assigned date. NIIN 006305683 was cancelled on January 1, 1963, with a cancelled status of "Item is Cancelled as Duplicate." This NSN was replaced by NSN 1005006054204. This NSN does not replace any other NSNs. There are no manufacturer part numbers associated to this NSN. This part number has not been procured by the US Government in over 5 years. There is no data in the HMIRS and the NSN is in an FSC not generally suspected of containing hazardous materials. NSN 1005006305683 contains an unknown precious metal. This information was last updated on Jan 01, 2015.