The Mouthpiece,regulator, cataloged under National Stock Number 4220-01-256-3636, 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 Msi-Defence Systems Ltd. Government technical data includes 1 specification, cited from the U.S. Government catalog. The record lists 4 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4220-01-256-3636 |
| Primary Part Number | WD3220-016 |
| Item Name | Mouthpiece,regulator |
| FSC / FSG | 4220 / 42 — Marine Lifesaving and Diving Equipment |
| Manufacturer | Msi-Defence Systems Ltd |
| Status | ACTIVE |
| General Characteristics Item Description | RUBBER CHLOROPRENE; BLACK OCTOPUS |
| 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 |
|---|---|
| WD3220-016 | Msi-Defence Systems Ltd (GBR) |
| 1058-79 | Midland Diving Equipment Limited (GBR) |
| WD3220/16 | Msi-Defence Systems Ltd (GBR) |
| WD3220 ITEM 16 | Msi-Defence Systems Ltd (GBR) |
| Reference | Meaning |
|---|---|
| 1058-79 | 3/2 Design control — primary reference U.S. Government activity |
| 1058-79 | 5/9 Secondary reference Mar-Vel International, Inc. Dba Mar-Vel Underwater Equip |
NSN 4220-01-256-3636 is a Mouthpiece,regulator, manufactured by Msi-Defence Systems Ltd, classified under FSC 4220, Marine Lifesaving and Diving Equipment. Status: active.
NSN 4220-01-256-3636 has 4 manufacturer part numbers on file: WD3220-016 (Msi-Defence Systems Ltd), 1058-79 (Midland Diving Equipment Limited), WD3220/16 (Msi-Defence Systems Ltd), WD3220 ITEM 16 (Msi-Defence Systems Ltd).
Key specifications for WD3220-016: General Characteristics Item Description: RUBBER CHLOROPRENE; BLACK OCTOPUS. 1 specification is 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.