NSN 2990-01-679-4209, 2990016794209
MUFFLER,SPECIAL

Federal Supply Classification: FSC 2990 - Miscellaneous Engine Accessories, Nonaircraft
National Item Identification Number: NIIN 016794209
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.

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DLMS^® Summary

National Stock Number 2990-01-679-4209

National Stock Number (NSN) 2990-01-679-4209, or NIIN 016794209, (muffler,special) was assigned March 22, 2019 in the Federal Logistics Information System (FLIS). This NSN does not replace any other NSNs.

There are 5 manufacturer part numbers associated with this NSN. 2 of those 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, 2 suppliers are deemed design controlled or valid supply parts.

This part number is actively being procured by the US Government, with procurement history within the last 90 days. There have been 9 contracts issued for this part number, with 9 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: SPE7L325P5230, SPE7L325P5230, SPE7L525P1454, SPE7L525P1356, SPE7L525P1235. The total value of the awarded contracts has been US$ 10,191,235.20.

This NSN is unique to one weapons system.

There has been a small amount of 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 Mar 23, 2019, this NSN's acquisition method was noted as: Suitable for Competitive Acquisition. (Potential sources shall include dealers/distributors.) The Government has unlimited rights to the technical data, and the data package is complete. Valid AMCs: 1 and 2.

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 2990016794209 does not contain precious metals.

This information was last updated on Jul 01, 2025.

Technical Characteristics

END ITEM IDENTIFICATION: (AGAV) NSSN CLASS SUBMARINE
GENERAL CHARACTERISTICS ITEM DESCRIPTION: (TEXT) MUFFLER/DIFFUSER ASSEMBLY REQUIRES SHOCK QUALIFICATION I/A/W SECTION 072 OF THE NSSN CLASS SHIPS SPECIFICATIONS AND PPD 802-6337447, DDAM PROCEDURES; THE FOLLOWING ATTRIBUTES APPLY: SHOCK QUALIFICATION METHOD: ANALYSIS; SHOCK TEST CATEGORY: NOT AVAILABLE; SHOCK GRADE: B; EQUIPMENT TEST/ANALYSIS CLASS: NOT AVAILABLE; EQUIPMENT HOLD-DOWN MEANS: GRADE 500 SIZE 1.250; MATERIAL: QQ-N-286 CLASS A, SPECIFICATION: MIL-S-1222H; SHOCK TEST TYPE: NOT AVAILABLE; MOUNTING LOCATION (SHIPBOARD): WETTED SURFACE; MOUNTING PLANE (SHIPBOARD): NOT AVAILABLE; MOUNTING ORIENTATION (SHIPBOARD): NOT AVAILABLE; LIMITATIONS: NONE; QUALIFICATION APPROVAL DOCUMENT (IF COMPLETE) IS REFERENCED IN THE DOCUMENT FIELD WITHIN THE PART DESCRIPTION(S)
PART NAME ASSIGNED BY CONTROLLING AGENCY: (CXCY) COMPOUND MUFFLER
SPECIAL TEST FEATURES: (SPCL) REFER TO EB SPECIFICATION 4229; THE POLYMER FOR THE FOUR MUFFLER LAYERS SHALL BE RW-2577-82 I/A/W SECTION 3.4.1; THE FILLER MATERIAL FOR THE MUFFLER LAYERS SHALL BE I/A/W SECTION 2.1 OF APPENDIX A OF THE SPECIFICATION; THE % FILL FOR EACH LAYER SHALL BE I/A/W TABLE 1 OF APPENDIX A
SPECIFICATION/STANDARD DATA: (ZZZK) 80204-ANSI Y14.5M-1982 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
SUPPLEMENTARY FEATURES: (SUPP) NOISE CONTROL (SUBMARINE)
PART NAME ASSIGNED BY CONTROLLING AGENCY: (CXCY) COMPOUND MUFFLER FW
END ITEM IDENTIFICATION: (AGAV) MUFFLER AY,DI