National Stock Number
6540-01-158-3616
National Stock Number (NSN) 6540-01-158-3616, or NIIN 011583616, (lens blank,ophthalmic,sphere,sem) was assigned July 22, 1983 in the Federal Logistics Information System (FLIS). This NIIN is Available for Manual Assignment. This NSN replaces 2 stock numbers: 6540013158440, 6540011563441.
There are 3 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 4 suppliers. Today, 3 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.
Based on a planned procurement review by the Primary Inventory Control Activity (PICA) on Dec 02, 2006, 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) 30303. [A TRANSPARENT MOLDED OPTICAL ELEMENT HAVING EQUAL SPHERICAL DIOPTER CURVATURES, AN APPROXIMATE SIZE AND SHAPE, AND HAS BEEN GROUND AND POLISHED TO A FINISHED CURVATURE ON ONE SURFACE ONLY.]. 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 6540011583616 does not contain precious metals.
This NSN is associated to Schedule B 7014001000: lens blanks (other than for spectacles) not optically worked, of glass, (optical elements). The Schedule B End Use is listed as other industrial supplies. NAICS classification category 327212: other pressed and blown glass and glassware manufacturing.
This information was last updated on Aug 01, 2025.