National Stock Number
3040-01-325-5681
National Stock Number (NSN) 3040-01-325-5681, or NIIN 013255681, (nut,coupling,flexible casing) was assigned September 6, 1990 in the Federal Logistics Information System (FLIS). This NIIN is Available for Manual Assignment. 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.
Based on a planned procurement review by the Primary Inventory Control Activity (PICA) on Sep 14, 1995, 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 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) 20314. [AN ITEM OF METALLIC COMPOSITION WITH INTERNAL THREADS AND AN INTERNAL SEAT OR SHOULDER DESIGNED FOR THE PURPOSE OF JOINING A FLEXIBLE CASING, SUCH AS A CASING, FLEXIBLE SHAFT ASSEMBLY CAPPED WITH A FERRULE AND FITTING. SEE ALSO NUT, COUPLING, ELECTRICAL CONDUIT.]. The item is a non-aviation Critical Safety Item (CSI) whose failure will result in serious damage to equipment or serious injury or death to personnel. There is no data in the HMIRS and the NSN is in an FSC not generally suspected of containing hazardous materials. NSN 3040013255681 does not contain precious metals.
This NSN is associated to Schedule B 8483608000: shaft couplings, except universal joints. The Schedule B End Use is listed as industrial machines, other. NAICS classification category 333613: mechanical power transmission equipment manufacturing.
This information was last updated on Aug 01, 2025.