National Stock Number
5985-01-004-2079
National Stock Number (NSN) 5985-01-004-2079, or NIIN 010042079, (isolator,radio frequency reflect) was assigned May 29, 1975 in the Federal Logistics Information System (FLIS). This NIIN is Available for Manual Assignment. This NSN does not replace any other NSNs.
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 3 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 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, 2006, this NSN's acquisition method was noted as: Suitable for Competitive Acquisition. (Potential sources shall include dealers/distributors.) This part requires engineering source approval by the design control activity in order to maintain the quality of the part. An alternate source must qualify in accordance with the design control activity's procedures, as approved by the cognizant Government engineering activity. Valid AMCs: 1, 2, 3, 4 and 5.
This NSN is assigned to Item Name Code (INC) 20347. [A DEVICE WHICH ALLOWS RADIO FREQUENCY ENERGY TO PASS IN ONE DIRECTION WITH VERY LITTLE POWER LOSS, BUT BLOCKS THE FLOW OF ENERGY IN THE OTHER DIRECTION BY MEANS OF MULTIPLE WAVE-POLARIZATION OR AN INTEGRAL DISSIPATIVE LOAD. IT ISOLATES FREQUENCY SENSITIVE CIRCUITY FROM THE EFFECTS OF REFLECTED RADIO FREQUENCY ENERGY RESULTING FROM COMPONENT MISMATCH. IT USUALLY HAS ONE OR MORE PORTS TERMINATED WITH COAXIAL CONNECTOR(S) AND/OR WAVEGUIDE FLANGE(S); OR OTHER ELECTRICAL TERMINATIONS. ISOLATORS DESIGNED FOR INTERNAL USE IN WAVEGUIDE RUNS MAY CONSIST OF RODS, RINGS, CHIPS, STRIPS AND THE LIKE AND HAVE NO PORTS OR TERMINATIONS. SEE ALSO DIPLEXER; DUPLEXER. EXCLUDES:CIRCULATOR, RADIO FREQUENCY.]. 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 5985010042079 contains an unknown precious metal.
This NSN is associated to Schedule B 8529109000: antenna & antenna reflectors of all kinds; parts suitable for use soley or principally w/ apparatus of heading 8525 to 8528, nesoi. The Schedule B End Use is listed as telecommunications equipment. NAICS classification category 334220: radio and television broadcasting and wireless communications equipment manufacturing.
This information was last updated on Jul 01, 2025.