National Stock Number
5340-01-657-5138
National Stock Number (NSN) 5340-01-657-5138, or NIIN 016575138, (insert,self-locking) was assigned August 17, 2016 in the Federal Logistics Information System (FLIS). This NIIN is Available for Manual Assignment. This NSN does not replace any other NSNs.
There are 2 manufacturer part numbers 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, only one supplier is 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 Aug 18, 2016, this NSN's acquisition method was noted as: Acquire directly from the actual manufacturer, whether or not the prime contractor is the actual manufacturer. The Government does not have adequate data, lacks rights to data, or both, needed to purchase this part from additional sources. Valid AMCs: 1, 2, 3, 4 and 5.
This NSN is assigned to Item Name Code (INC) 31470. [A NONMETALLIC UNTHREADED ITEM GENERALLY ROUND IN CROSS-SECTIONAL SHAPE WHICH, WHEN PLACED ON/IN A MACHINED-OUT PORTION OF THE THREADS OF A SCREW OR BOLT, OR INSERTED INTO THE MACHINED-OUT PORTION OF THE THREADS OF A NUT, LOCKS THE ITEM, TO WHICH IT IS FIXED, TO THE ATTACHED MATING MEMBER AND PREVENTS LOOSENING DURING EXCESSIVE VIBRATION. EXCLUDES BOLT, SELF-LOCKING; NUT, SELF-LOCKING (AS MODIFIED); SCREW, SELF-LOCKING; AND INSERT, SCREW THREAD.]. 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 5340016575138 does not contain precious metals.
This information was last updated on Jul 01, 2025.