National Stock Number (NSN) 6340-01-281-4281, or NIIN 012814281, (sensor,opaque particle) was assigned June 23, 1988 in the Federal Logistics Information System (FLIS). This NIIN is Available for Manual Assignment. This NSN replaces 1 stock number, 6340008983433.
There are 4 manufacturer part numbers associated with this NSN. 2 of those part number(s) are considered obsolete. The manufacturer part numbers were originally supplied by 2 suppliers. Today, 2 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 is actively being procured by the US Government, with procurement history within the last 90 days. There have been 11 contracts issued for this part number, with 16 awards given. There is minimal competition for this NSN. The US Government has awarded contracts to 2 different suppliers. The last contract numbers awarded were: SPE4A625F093P, SPE4A625F7579, SPE4A625F6240, SPE4A619P3968, SPE4A615D5876. The total value of the awarded contracts has been US$ 748,691.36.
This NSN is somewhat common among different platforms, belonging to 2 different weapons systems.
There has been a small amount of demand for this national stock number. The demand for this NSN originated from less than 5 countries. Based on a planned procurement review by the Primary Inventory Control Activity (PICA) on Dec 31, 2013, this NSN's acquisition method was noted as: Suitable for Competitive Acquisition. (Potential sources shall include dealers/distributors.) Acquisition of this part is restricted to source(s) specified on "Source Control", "Altered Item" or "Selected Item" drawings/documents. Valid AMCs: 1, 2, 3, 4 and 5.
This NSN is assigned to Item Name Code (INC) 37790. [A DEVICE DESIGNED TO DETECT THE PRESENCE OF PREDETERMINED AMOUNTS OF SMOKE, DUST, AND THE LIKE, WITHIN THE MEASURING AREA. THE PRESENCE OF ANY OF THESE SUBSTANCES CAUSES A CHANGE IN THE OUTPUT SIGNAL OF THE DEVICE, WHICH RELAYS A WARNING MESSAGE BACK TO A CENTRAL PANEL. THE DEVICE ITSELF DOES NOT PROVIDE ANY AUDIBLE OR VISIBLE OUTPUT, OR ANALYZE CHEMICAL CONTENT. EXCLUDES:ALARM, SMOKE, AUTOMATIC.]. 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 6340012814281 does not contain precious metals.
This NSN is associated to Schedule B 8531100025: smoke detectors, nesoi. The Schedule B End Use is listed as photo, service industry machinery. NAICS classification category 334290: other communications equipment manufacturing.
This information was last updated on Jul 01, 2025.