The Hook,mask, cataloged under National Stock Number 4220-01-579-0666, 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 Kirby Morgan Dive Systems Inc. Government technical data includes 1 specification, 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 4220-01-579-0666 |
| Primary Part Number | 820-110 |
| Item Name | Hook,mask |
| FSC / FSG | 4220 / 42 — Marine Lifesaving and Diving Equipment |
| Manufacturer | Kirby Morgan Dive Systems Inc |
| Status | ACTIVE |
| Criticality Code Justification | FEAT |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | S |
| Part Number | Manufacturer |
|---|---|
| 820-110 | Kirby Morgan Dive Systems Inc (USA) |
| Reference | Meaning |
|---|---|
| 2117-065 | 3/2 Design control — primary reference U.S. Government activity |
NSN 4220-01-579-0666 is a Hook,mask, manufactured by Kirby Morgan Dive Systems Inc, classified under FSC 4220, Marine Lifesaving and Diving Equipment. Status: active.
NSN 4220-01-579-0666 has 1 manufacturer part number on file: 820-110 (Kirby Morgan Dive Systems Inc).
Key specifications for 820-110: Criticality Code Justification: FEAT; Special Features: EXPLOSIVE ORDNANCE DISPOSAL (EOD) TOOLS/EQUIPMENT.; Part Name Assigned by Controlling Agency: POD CATCH HOOK; End Item Identification: MK16MOD2,UNDERWATER BREATHING APPARATUS (EOD). 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.