National Stock Number
6640-00-551-8426
National Stock Number (NSN) 6640-00-551-8426, or NIIN 005518426, (clamp,utility,laboratory) was assigned January 1, 1961 in the Federal Logistics Information System (FLIS). NIIN 005518426 was cancelled on October 2, 2013, with a cancelled status of "Item is Cancelled WITHOUT Replacement." There is no known replacement specified for this stock number. This NSN replaces 2 stock numbers: 6640005518423, 6640008795046.
There are 4 manufacturer part numbers associated with this NSN. One of those 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 unique to one weapons system.
Based on a planned procurement review by the Primary Inventory Control Activity (PICA) on Dec 01, 2020, this NSN's acquisition method was noted as: Acquire directly from the actual manufacturer, whether or not the prime contractor is the actual manufacturer. This part is a commercial/non-developmental/off-the-shelf-item. Valid AMCs: 1, 2, 3, 4 and 5.
This NSN is assigned to Item Name Code (INC) 21996. [A CLAMP CONSISTING OF ONE TO TWO SETS OF JAWS FOR SUPPORTING AND STABILIZING LABORATORY VESSELS, SUCH AS TEST TUBE, BURETTE, CONDENSER, AND THE LIKE, DURING ANALYSIS. IT CAN BE INSERTED INTO A CLAMP,LABORATORY SUPPORT ROD TO BE ATTACHED TO A SUPPORT ROD. IT MAY BE A TWO- OR THREE-PRONG EXTENSION CLAMP. EXCLUDES:CLAMP,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 6640005518426 contains an unknown precious metal.
This information was last updated on Aug 01, 2025.