NSN 4320-01-055-0312, 4320010550312
Cancelled -> Replaced by 4320010321968

Federal Supply Classification: FSC 4320 - Power and Hand Pumps
National Item Identification Number: NIIN 010550312
Codification Country: United States
Item Name Code: INC 77777
Criticality: (X) This item does not have a nuclear hardened feature or any other critical feature such as tolerance, fit restriction or application.
Hazardous Material Indicator Code: (N) There is no data in the HMIRS and the NSN is in an FSC not generally suspected of containing hazardous materials.

Availability: Readily Available Qualified Suppliers: We have 2 qualified suppliers

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DLMS^® Summary

National Stock Number 4320-01-055-0312

National Stock Number (NSN) 4320-01-055-0312, or NIIN 010550312, (piston and shoe assy) was assigned January 30, 1978 in the Federal Logistics Information System (FLIS). This NSN replaces 1 stock number, 4320010321968.

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, only one supplier is 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, with the most recent procurement date of Jul 19, 2018. There have been 4 contracts issued for this part number, with 19 awards given. The US Government has only awarded those contracts to one supplier. The last contract numbers awarded were: SPE4A518F01Q1, SPE4AX14D9413, SPE4AX14D9413, SPE4AX14D9413, SPE4AX14D9413. The total value of the awarded contracts has been US$ 209,917.41.

This NSN is somewhat common among different platforms, belonging to 2 different weapons systems.

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 Jul 02, 2005, 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 rights to use the data needed to purchase this part from additional sources are not owned by the Government and cannot be purchased. Valid AMCs: 1, 2, 3, 4 and 5.

This NSN is assigned to Item Name Code (INC) 77777. 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 4320010550312 contains an unknown precious metal.

This information was last updated on Jun 01, 2025.