NSN 2990-00-478-8339, 2990004788339
CYLINDER,REGULATING VALVE

Federal Supply Classification: FSC 2990 - Miscellaneous Engine Accessories, Nonaircraft
National Item Identification Number: NIIN 004788339
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: Currently qualifying suppliers

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DLMS^® Summary

National Stock Number 2990-00-478-8339

National Stock Number (NSN) 2990-00-478-8339, or NIIN 004788339, (cylinder,regulating valve) was assigned February 2, 1970 in the Federal Logistics Information System (FLIS). 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.

This part number has not been procured by the US Government in over 5 years, with the most recent procurement date of Mar 02, 2018. There have been 2 contracts issued for this part number, with 2 awards given. There is minimal competition for this NSN. The US Government has awarded contracts to 2 different suppliers. The last contract numbers awarded were: SPE7L518V1018, SPM7LX10D9001. The total value of the awarded contracts has been US$ 294.91.

This NSN is somewhat common among different platforms, belonging to 6 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 Sep 20, 2008, 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) 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 2990004788339 contains an unknown precious metal.

This information was last updated on Jul 01, 2025.

Technical Characteristics

GENERAL CHARACTERISTICS ITEM DESCRIPTION: (TEXT) BRASS,2.813 IN. LG,1.625 IN. HEXAGON WIDTH,1.875 IN. LARGEST OD,1-688 IN. ID 2.250 IN. DEEP,1.500 IN.-20 UN THD ONE END,ONE 0.313 IN. DIA HOLE THROUGH CENTER EACH FLAT,2.031 IN. FROM PLAIN END TO CENTER OF HOLE
GENERAL CHARACTERISTICS ITEM DESCRIPTION: (TEXT) KBRASS,2.813 IN. LG,1.625 IN. HEXAGON WIDTH,1.875 IN. LARGEST OD,1-688 IN. ID 2.250 IN. DEEP,1.500 IN.-20 UN THD ONE END,ONE 0.313 IN. DIA HOLE THROUGH CENTER EACH FLAT,2.031 IN. FROM PLAIN END TO CENTER OF HOLE