NSN 4210-01-522-1681 · NIIN 015221681 · Part number 521-7549585-A3
Naval Sea Systems Command · FSC 4210 — Firefighting Equipment · FSG 42 — Fire Fighting, Rescue, and Safety Equipment · CAGE 53711
Government record, cited
NSN 4210-01-522-1681 — this item is cataloged by the U.S. Government under National Stock Number 4210-01-522-1681. Manufacturer of record part number: 521-7549585-A3.
FSG: 42 — Fire Fighting, Rescue, and Safety Equipment
Primary part number: 521-7549585-A3
Manufacturer: Naval Sea Systems Command
General Description
The Extinguisher Subassembly,fire, cataloged under National Stock Number 4210-01-522-1681, is classified within Federal Supply Class 4210 (Firefighting Equipment) of the Fire Fighting, Rescue, and Safety Equipment group. The manufacturer of record is Naval Sea Systems Command. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
Catalog Facts
Item Name
Extinguisher Subassembly,fire
FSC / FSG
4210 — Firefighting Equipment (FSG 42)
Manufacturers
Naval Sea Systems Command (CAGE 53711)
Technical Specifications
Parameter
Value
NSN
4210-01-522-1681
Primary Part Number
521-7549585-A3
Item Name
Extinguisher Subassembly,fire
FSC / FSG
4210 / 42 — Firefighting Equipment
Manufacturer
Naval Sea Systems Command
Status
ACTIVE
Lifecycle & Compliance
Acquisition Status
ACTIVE
DEMIL Code
DEMIL Q — CCL Item — Commerce Control List
Hazard
Possible hazard — SDS may be required (DLA HMIC P)
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
4210-00-001-3525
CYLINDER ASSEMBLY,LIQUID
4210-00-001-3526
CYLINDER ASSEMBLY,LIQUID
4210-00-003-6976
4210-00-003-6976 · Item name not on file
4210-00-004-8316
NOZZLE,FIRE EQUIPMENT
4210-00-005-1080
4210-00-005-1080 · Item name not on file
4210-00-005-7152
4210-00-005-7152 · Item name not on file
4210-00-005-7684
4210-00-005-7684 · Item name not on file
4210-00-006-6244
4210-00-006-6244 · Item name not on file
Frequently Asked Questions
What is NSN 4210-01-522-1681?
NSN 4210-01-522-1681 is a Extinguisher Subassembly,fire, manufactured by Naval Sea Systems Command, classified under FSC 4210, Firefighting Equipment. Status: active.
What part numbers are listed for NSN 4210-01-522-1681?
NSN 4210-01-522-1681 has 1 manufacturer part number on file: 521-7549585-A3 (Naval Sea Systems Command).
Is NSN 4210-01-522-1681 hazardous material?
Possible hazard — SDS may be required (DLA HMIC P). Hazard information on this page is shown exactly as it appears in the DLA record.
What is the DEMIL code for NSN 4210-01-522-1681?
NSN 4210-01-522-1681 has DEMIL Code Q. Demilitarization may be required before disposal or transfer to non-military entities.
Sources
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
✓ Data cited from the U.S. Government catalog; commercial cross-references from OEM and certified industry sources.