National Stock Number
5310-00-445-8444
National Stock Number (NSN) 5310-00-445-8444, or NIIN 004458444, (washer,preload indicating) was assigned January 1, 1963 in the Federal Logistics Information System (FLIS). This NIIN is Available for Manual Assignment. This NSN does not replace any other NSNs.
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 3 suppliers. Today, 3 suppliers are listed as Active suppliers for this NSN. Of the active suppliers, 3 suppliers are deemed design controlled or valid supply parts. ISO Group has several sources of supply for this NSN.
This part number has not been procured by the US Government in over 5 years.
There has been very little demand for this national stock number. The demand for this NSN originated from less than 5 countries.
This NSN is assigned to Item Name Code (INC) 42430. [AN ITEM ROUND IN SHAPE HAVING A CENTRALLY LOCATED HOLE. IT CONSISTS OF TWO CONCENTRIC (INNER AND OUTER) STEEL RINGS, THE INNER RING IS SMALLER IN DIAMETER AND HIGHER THAN THE OTHER. THESE RINGS ARE SANDWICHED BETWEEN TWO CLOSE TOLERANCE PLAIN WASHERS. AS THE ASSEMBLY IS TIGHTENED, THE INNER RING TAKES THE LOAD AND IS DEFORMED UNTIL THE LOOSE OUTER RING IS BOUND BETWEEN THE UPPER AND LOWER PLAIN WASHERS AND CANNOT BE MOVED. THE TIGHTENED LOAD IN THE BOLT IS EQUAL TO THE LOAD REQUIRED TO COMPRESS THE INNER RING. WHEN THE BINDING OF THE OUTER RING OCCURS AND CAN NOT BE MOVED, IT IS A SIGN THAT THE DESIRED LOAD HAS BEEN REACHED.]. 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 5310004458444 contains an unknown precious metal.
This information was last updated on Jul 01, 2025.