National Stock Number
6640-00-402-1816
National Stock Number (NSN) 6640-00-402-1816, or NIIN 004021816, (connector,tubing,branched) was assigned April 8, 1970 in the Federal Logistics Information System (FLIS). NIIN 004021816 was cancelled on December 16, 2017, with a cancelled status of "Item is Cancelled - Inactive." There is no known replacement specified for this stock number. This NSN does not replace any other NSNs.
There is only one manufacturer part number associated with this NSN. None of the associated part number(s) are considered obsolete. The manufacturer part numbers were originally supplied by one supplier. Today, one supplier is listed as an Active supplier for this NSN. Of the active suppliers, there are no suppliers that are deemed design controlled or valid supply parts.
This part number has not been procured by the US Government in over 5 years.
This NSN is assigned to Item Name Code (INC) 37514. [A METALLIC/NONMETALLIC ITEM OF EITHER A T OR Y SHAPE USED IN MAKING THREE WAY CONNECTIONS WITH METALLIC/NONMETALLIC TUBING.]. This item does not have a nuclear hardened feature or any other critical feature such as tolerance, fit restriction or application. There is no information in the HMIRS; however, the NSN is in an FSC in Table II of Federal Standard 313 and an MSDS may be required by the user. The requirement for an MSDS is dependent on a hazard determination of the supplier or the intended end use of the product. NSN 6640004021816 contains an unknown precious metal.
This information was last updated on Aug 01, 2025.