National Stock Number
3040-01-684-6398
National Stock Number (NSN) 3040-01-684-6398, or NIIN 016846398, (brake,expander tube) was assigned November 8, 2019 in the Federal Logistics Information System (FLIS). This NIIN is Available for Manual Assignment. This NSN does not replace any other NSNs.
There is only one manufacturer part number associated with this NSN. None of the associated 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, 2 suppliers are 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 assigned to Item Name Code (INC) 09194. [A BRAKE CONSISTING ESSENTIALLY OF THE FOLLOWING: A. A FRAME DESIGNED TO FIT OVER AND BE ATTACHED TO THE TORQUE FLANGE OF THE AXLE, AND HAVING PROVISIONS FOR HOUSING AN EXPANDER TUBE AND BRAKE BLOCKS. B. AN EXPANDER TUBE WHICH IS A FLAT RUBBER TUBE DESIGNED TO BE FILLED WITH BRAKE FLUID AND THEREBY FORCE BRAKE BLOCKS AGAINST THE BRAKE DRUM. C. BRAKE BLOCKS WHICH MAY BE CEMENTED TO THE EXPANDER TUBE OR FITTED INTO THE FRAME ABOVE THE EXPANDER TUBE.]. 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 3040016846398 does not contain precious metals.
This information was last updated on Jul 01, 2025.