The Head Harness, cataloged under National Stock Number 4220-01-331-3260, 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 Interspiro Inc. 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4220-01-331-3260 |
| Primary Part Number | 336-100-809 |
| Item Name | Head Harness |
| FSC / FSG | 4220 / 42 — Marine Lifesaving and Diving Equipment |
| Manufacturer | Interspiro Inc |
| Status | ACTIVE |
| General Characteristics Item Description | RUBBER; GRAY |
| 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 |
|---|---|
| 336-100-809 PRIMARY | Interspiro Inc (USA) |
| 460 190 375 | Interspiro Ltd (GBR) |
| 336-100-809 | Interspiro Aktiebolag (SWE) |
| 6318059 | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| WD1899 | 5/1 Secondary reference Msi-Defence Systems Ltd |
| 336-100-809 | 5/9 Secondary reference Interspiro Ab |
| 331-100-631 | 5/9 Secondary reference Interspiro Inc |
NSN 4220-01-331-3260 is a Head Harness, manufactured by Interspiro Inc, classified under FSC 4220, Marine Lifesaving and Diving Equipment. Status: active.
NSN 4220-01-331-3260 has 4 manufacturer part numbers on file: 336-100-809 (Interspiro Inc), 460 190 375 (Interspiro Ltd), 336-100-809 (Interspiro Aktiebolag), 6318059 (Naval Sea Systems Command).
Key specifications for 336-100-809: General Characteristics Item Description: RUBBER; GRAY. 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.