National Stock Number (NSN) 5325-00-421-6658, or NIIN 004216658, (stud,turnlock fastener) was assigned December 9, 1970 in the Federal Logistics Information System (FLIS). This NIIN is Available for Manual Assignment. This NSN replaces 1 stock number, 5325002820650.
There are 7 manufacturer part numbers associated with this NSN. 3 of those part number(s) are considered obsolete. The manufacturer part numbers were originally supplied by 2 suppliers. Today, 2 suppliers are listed as Active suppliers 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 a year. There have been 4 contracts issued for this part number, with 4 awards given. There is minimal competition for this NSN. The US Government has awarded contracts to 3 different suppliers. The last contract numbers awarded were: SPE4A623V4577, SPE4A623P0664, SPE5E418V6398, SPE5E416V4072. The total value of the awarded contracts has been US$ 512.01.
This NSN is unique to one weapons system.
There has been very little demand for this national stock number. The demand for this NSN originated from less than 5 countries. Based on a planned procurement review by the Primary Inventory Control Activity (PICA) on Mar 02, 2006, this NSN's acquisition method was noted as: Suitable for Competitive Acquisition. (Potential sources shall include dealers/distributors.) This part requires engineering source approval by the design control activity in order to maintain the quality of the part. An alternate source must qualify in accordance with the design control activity's procedures, as approved by the cognizant Government engineering activity. Valid AMCs: 1, 2, 3, 4 and 5.
This NSN is assigned to Item Name Code (INC) 18421. [A PINLIKE ITEM DESIGNED TO TURN WITHIN AND BE HELD IN PLACE BY AN EYELET, TURNLOCK FASTENER; RING, RETAINING; OR THE SURFACE OF THE ITEM IT FASTENS. IT IS PROVIDED WITH EITHER A CAM SLOT, CAM LEAD THREADS, OR A HOLD FOR ACCOMMODATING A PIN. SECURING IS ACCOMPLISHED BY MATING WITH A LOCKSPRING, TURNLOCK FASTENER OR RECEPTACLE, TURNLOCK FASTENER. IT HAS EITHER PROVISIONS TO ACCOMMODATE A KNOB OR EXTENSION OR HAS A HEAD WHICH HAS PROVISIONS TO FACILITATE TURNING.]. This item does not have a nuclear hardened feature or any other critical feature such as tolerance, fit restriction or application. There is no data in the HMIRS and the NSN is in an FSC not generally suspected of containing hazardous materials. NSN 5325004216658 contains an unknown precious metal.
This NSN is associated to Schedule B 9607190000: slide fasteners, nesoi. The Schedule B End Use is listed as finished textile supplies. NAICS classification category 339993: fastener, button, needle, and pin manufacturing.
This information was last updated on Jul 01, 2025.