National Stock Number (NSN) 5985-01-180-1840, or NIIN 011801840, (switch,radio frequency transmission line) was assigned May 25, 1984 in the Federal Logistics Information System (FLIS). NIIN 011801840 was cancelled on November 2, 2018, with a cancelled status of "Item is Cancelled WITHOUT Replacement." There is no known replacement specified for this stock number. This NSN replaces 1 stock number, 5985014089786.
There are 5 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 3 suppliers. Today, 2 suppliers are listed as Active suppliers for this NSN. Of the active suppliers, there are no suppliers that are deemed design controlled or valid supply parts.
This part number has not been procured by the US Government in over 5 years, with the most recent procurement date of Sep 17, 2014. There have been 3 contracts issued for this part number, with 3 awards given. The US Government has only awarded those contracts to one supplier. The last contract numbers awarded were: SPE7M514MA528, SPE7M514M3581, SPE7M514M3581, SPM7MC13M0309. The total value of the awarded contracts has been US$ 228,823.12.
This NSN is unique to one weapons system.
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 Nov 06, 2020, this NSN's acquisition method was noted as: Acquire directly from the actual manufacturer, whether or not the prime contractor is the actual manufacturer. 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) 05298. [AN ITEM SPECIFICALLY DESIGNED FOR MECHANICALLY OR ELECTRONICALLY POSITIONING ONE OR MORE RADIO FREQUENCY TRANSMISSION LINE SECTIONS SO AS TO COUPLE IT OR THEM TO OTHER SECTIONS IN A RADIO FREQUENCY TRANSMISSION LINE SYSTEM. THE SWITCHING FUNCTION MAY BE OPERATED BY A MANUAL ACTUATOR, AN ELECTROMECHANICAL ACTUATOR OR BY MEANS OF AN ARRANGEMENT OF SEMICONDUCTORS AND PASSIVE CIRCUIT DEVICES. FOR ITEMS DESIGNED TO PROVIDE THE TRANSFER OF THE ELECTRICAL SIGNAL, SEE: SWITCH,ROTARY AND SWITCH,ELECTRONIC. EXCLUDES: RELAY, (AS MODIFIED).]. 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 5985011801840 does not contain precious metals.
This information was last updated on Aug 01, 2025.