National Stock Number
4310-01-255-6521
National Stock Number (NSN) 4310-01-255-6521, or NIIN 012556521, (connecting rod,piston) was assigned May 23, 1987 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 Apr 02, 2005, 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 physically does not have in its possession sufficient, accurate, or legible data to purchase this part from other than current source(s). (NOTE: This code is applicable only to parts under immediate buy requirements and only as long as the deficiency is under review for resolution and appropriate recoding.) Valid AMCs: 1, 2, 3, 4 and 5.
This NSN is assigned to Item Name Code (INC) 60266. [A DEVICE USED FOR CONNECTING A PISTON TO A CRANKSHAFT OR TO A MASTER CONNECTING ROD OF AN INTERNAL COMBUSTION ENGINE, STEAM RECIPROCATING ENGINE, RECIPROCATING AIR COMPRESSOR, OR THE LIKE. THE ROD MAY BE CONNECTED DIRECTLY TO THE PISTON, OR IT MAY TRANSMIT THE MOTION THROUGH A CROSSHEAD.]. There is no data in the HMIRS and the NSN is in an FSC not generally suspected of containing hazardous materials. NSN 4310012556521 does not contain precious metals.
This NSN is associated to Schedule B 8414902095: parts nesoi, of compressors other than refrigerating and air conditioning compressors. The Schedule B End Use is listed as industrial engines. NAICS classification category 333912: air and gas compressor manufacturing.
This information was last updated on Jul 01, 2025.