National Stock Number
2520-00-311-6578
National Stock Number (NSN) 2520-00-311-6578, or NIIN 003116578, (clutch,sliding sleeve,vehicular) was assigned January 1, 1963 in the Federal Logistics Information System (FLIS). This NIIN is Available for Manual Assignment. This NSN replaces 4 stock numbers: 2520004706456, 2520004633728, 2520003179795, 2520006088541.
There are 10 manufacturer part numbers associated with this NSN. 7 of those part number(s) are considered obsolete. The manufacturer part numbers were originally supplied by 16 suppliers. Today, 7 suppliers are listed as Active suppliers for this NSN. Of the active suppliers, 4 suppliers are 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) 52058. [AN INTERNALLY SPLINED METALLIC CLUTCH, OPERATING ON A SPLINED SHAFT, DESIGNED TO TRANSMIT MOTION OR POWER TO AN ABUTTING SHAFT BY MEANS OF ENGAGING THE EXTERNAL SPLINES ON THE DRIVEN SHAFT. USUALLY MANUALLY OPERATED.]. 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 2520003116578 contains an unknown precious metal.
This NSN is associated to Schedule B 8483909500: parts, nesoi, of bearing housings & plain shaft bearings, housed bearings, clutches, universal joints, flywheels and transmission shafts. 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.