The Breathing Apparatus,oxygen Gener, cataloged under National Stock Number 4240-00-616-2857, is classified within Federal Supply Class 4240 (Safety and Rescue Equipment) of the Fire Fighting, Rescue, and Safety Equipment group. The manufacturer of record is Naval Group Site De Lorient. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4240-00-616-2857 |
| Primary Part Number | SYB0221 |
| Item Name | Breathing Apparatus,oxygen Gener |
| FSC / FSG | 4240 / 42 — Safety and Rescue Equipment |
| Manufacturer | Naval Group Site De Lorient |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| SYB0221 | Naval Group Site De Lorient (FRA) |
| Reference | Meaning |
|---|---|
| MIL-B-24692 | 4/1 Identification reference U.S. Government activity |
NSN 4240-00-616-2857 is a Breathing Apparatus,oxygen Gener, manufactured by Naval Group Site De Lorient, classified under FSC 4240, Safety and Rescue Equipment. Status: active.
NSN 4240-00-616-2857 has 1 manufacturer part number on file: SYB0221 (Naval Group Site De Lorient).
1 possible match (shared part number, not a government interchangeability claim): 4240-01-049-0986. Verify interchangeability with system specifications before substitution.
Key specifications for SYB0221: End Item Identification: DAMAGE CONTROL EQUIPMENT. 0 specifications are documented in the U.S. Government catalog.
Possible hazard — SDS may be required (DLA HMIC P). Hazard information on this page is shown exactly as it appears in the DLA record.
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.