The Bladder Assembly,life Preserver, cataloged under National Stock Number 4220-01-374-9707, 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 5 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4220-01-374-9707 |
| Primary Part Number | BLADDER,MK5 MOD0 |
| Item Name | Bladder Assembly,life Preserver |
| FSC / FSG | 4220 / 42 — Marine Lifesaving and Diving Equipment |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Fastening Method | BRASS MANIFOLD WITH HEAT SEALABLE BASE |
| Size Designation | STANDARD |
| Color | ORANGE |
| Material | PLASTIC POLYAMIDE NYLON AND RUBBER SYNTHETIC COVER |
| Buoyancy Method | ORALLY INFLATED |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| BLADDER,MK5 MOD0 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| MIL-L-24778 | 4/1 Identification reference U.S. Government activity |
NSN 4220-01-374-9707 is a Bladder Assembly,life Preserver, manufactured by Naval Sea Systems Command, classified under FSC 4220, Marine Lifesaving and Diving Equipment. Status: active.
NSN 4220-01-374-9707 has 1 manufacturer part number on file: BLADDER,MK5 MOD0 (Naval Sea Systems Command).
1 possible match (shared part number, not a government interchangeability claim): 4220-01-375-2149. Verify interchangeability with system specifications before substitution.
Key specifications for BLADDER,MK5 MOD0: Fastening Method: BRASS MANIFOLD WITH HEAT SEALABLE BASE; Size Designation: STANDARD; Color: ORANGE; Material: PLASTIC POLYAMIDE NYLON AND RUBBER SYNTHETIC COVER. 5 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.