National Stock Number
4910-01-390-3446
National Stock Number (NSN) 4910-01-390-3446, or NIIN 013903446, (constrictor,bead expanding,pneum) was assigned May 17, 1994 in the Federal Logistics Information System (FLIS). This NIIN is Available for Manual Assignment. This NSN replaces 1 stock number, 4910013910727.
There are 7 manufacturer part numbers associated with this NSN. 3 of those part number(s) are considered obsolete. The manufacturer part numbers were originally supplied by 4 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. Based on a planned procurement review by the Primary Inventory Control Activity (PICA) on Dec 12, 2013, this NSN's acquisition method was noted as: Acquire directly from the actual manufacturer, whether or not the prime contractor is the actual manufacturer. The annual buy value of this part falls below the screening threshold of $10,000 but it has been screened for known source(s). (NOTE: This code shall not be used when screening parts entering the inventory. It shall not be assigned in preference to or supersede any other AMSC.) Valid AMCs: 1, 2, 3, 4 and 5.
This NSN is assigned to Item Name Code (INC) 20937. [A DEVICE USED TO APPLY PRESSURE ABOUT THE TREAD CIRCUMFERENCE OF A TUBELESS PNEUMATIC TIRE, CAUSING THE TIRE BEADS TO EXPAND AGAINST THE WHEEL RIM TO FORM AN AIRTIGHT SEAL. IT CONSISTS OF EITHER AN AIR, HYDRAULIC, SCREW, OR FRICTION FORCE CONTRACTED BAND, OR OF A CONFINED, INFLATABLE, CIRCULAR TUBE, INSIDE WHICH THE TIRE IS PLACED FOR APPLICATION OF PRESSURE.]. 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 4910013903446 does not contain precious metals.
This information was last updated on Aug 01, 2025.