The Life Preserver,vest, cataloged under National Stock Number 4220-00-252-0581, is classified within Federal Supply Class 4220 (Marine Lifesaving and Diving Equipment) of the Fire Fighting, Rescue, and Safety Equipment group. Government technical data includes 12 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4220-00-252-0581 |
| Item Name | Life Preserver,vest |
| FSC / FSG | 4220 / 42 — Marine Lifesaving and Diving Equipment |
| Status | ACTIVE |
| Collar | INCLUDED |
| Fastening Method | STRAPS FOR TRYING |
| Base Width | 55.500 INCHES NOMINAL IN |
| Nondefinitive Spec/std Data | 3 CLASS AND 1 TYPE |
| Size Designation | ADULT |
| Height | 24.000 INCHES NOMINAL IN |
| Color | GRAY, DECK |
| Material | COTTON, WOVEN COVER |
| Material | GLASS FILLING |
| Material | PLASTIC VINYL ENVELOPE |
| Buoyancy Method | BUOYANT MATERIAL |
| Cloth-Fabric Name | VINYL ENVELOPE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| MIL-L-18045 | 4/1 Identification reference U.S. Government activity |
NSN 4220-00-252-0581 is a Life Preserver,vest, classified under FSC 4220, Marine Lifesaving and Diving Equipment. Status: active.
2 possible matches (shared part number, not a government interchangeability claim): 4220-00-289-1892, 4220-01-485-1135. Verify interchangeability with system specifications before substitution.
Key specifications for 4220-00-252-0581: Collar: INCLUDED; Fastening Method: STRAPS FOR TRYING; Base Width: 55.500 INCHES NOMINAL IN; Nondefinitive Spec/std Data: 3 CLASS AND 1 TYPE. 12 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.