The Box Bottom,regulator,breathing a, cataloged under National Stock Number 4220-01-347-4676, is classified within Federal Supply Class 4220 (Marine Lifesaving and Diving Equipment) of the Fire Fighting, Rescue, and Safety Equipment group. The manufacturer of record is Naval Sea Systems Command. Government technical data includes 2 specifications, cited from the U.S. Government catalog. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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.
| Parameter | Value |
|---|---|
| NSN | 4220-01-347-4676 |
| Primary Part Number | 592-6318275 |
| Item Name | Box Bottom,regulator,breathing a |
| FSC / FSG | 4220 / 42 — Marine Lifesaving and Diving Equipment |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Criticality Code Justification | FEAT |
| Quantity of Persons for Which Designed | 1 |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | Y |
| Part Number | Manufacturer |
|---|---|
| 592-6318275 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 545-018 | 5/1 Secondary reference Kirby Morgan Dive Systems Inc |
NSN 4220-01-347-4676 is a Box Bottom,regulator,breathing a, manufactured by Naval Sea Systems Command, classified under FSC 4220, Marine Lifesaving and Diving Equipment. Status: active.
NSN 4220-01-347-4676 has 1 manufacturer part number on file: 592-6318275 (Naval Sea Systems Command).
Key specifications for 592-6318275: Criticality Code Justification: FEAT; Quantity of Persons for Which Designed: 1; Special Features: UNDERWATER LIFE SUPPORT IAW NAVSEA INSTRUCTION 10560.2B; End Item Identification: MK21MOD1 DIVING HELMET-SUPERLITE-AIR/MIXED. 2 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). 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.