National Stock Number
3040-00-377-8840
National Stock Number (NSN) 3040-00-377-8840, or NIIN 003778840, (shaft,straight) was assigned January 1, 1963 in the Federal Logistics Information System (FLIS). This NIIN is Available for Manual Assignment. This NSN does not replace any other NSNs.
There are 5 manufacturer part numbers associated with this NSN. 4 of those part number(s) are considered obsolete. The manufacturer part numbers were originally supplied by 6 suppliers. Today, 4 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 5 years.
This NSN is assigned to Item Name Code (INC) 22109. [A STRAIGHT SHAFT HAVING TWO OR MORE OF THE FOLLOWING CONDITIONS: A SPECIFIED SURFACE FINISH DESIGNATION IN THE RANGE OF 1 TO 125 MICROINCHES (O.O25 TO 3.2 MICROMETERS), ARITHMETICAL AVERAGE (AA), MACHINED PERIPHERAL FLAT(S), CIRCULAR GROOVE (S), KEYWAY(S), SPLINES, THREADS, OR HOLES. IT IS NOT DESIGNED FOR USE IN ALIGNING BY FITTING INTO CORRESPONDING HOLES OF ANOTHER ITEM. IT MAY BE DRILLED FOR LUBRICATING HOLES. FOR ITEMS HAVING AN INTEGRAL GEAR(S) OR WORM(S), SEE GEARSHAFT (AS MODIFIED). FOR ITEMS DESIGNED TO SUPPORT ROTATING MEMBERS SEE AXLE(1), STRAIGHT. FOR ITEMS NOT HAVING THE ABOVE CONDITIONS SEE PIN, STRAIGHT, HEADLESS. FOR ITEMS HAVING MACHINED ENDS WHICH CONSTITUTE STEPS SEE SHAFT(1), SHOULDERED; AXLE(1), SHOULDERED; AND BOLT, FLUID PASSAGE.]. 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 3040003778840 contains an unknown precious metal.
This NSN is associated to Schedule B 8483105000: transmission shafts and cranks, except camshafts and crankshafts. 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.