The Adapter,quick Connect and Discon, cataloged under National Stock Number 4220-01-307-4779, 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 Leidos, 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4220-01-307-4779 |
| Primary Part Number | 599819I |
| Item Name | Adapter,quick Connect and Discon |
| FSC / FSG | 4220 / 42 — Marine Lifesaving and Diving Equipment |
| Manufacturer | Leidos, Inc. |
| Status | ACTIVE |
| General Characteristics Item Description | FOR 0.855 IN. MIN 0.895 IN. MAX ID HOSE; U/W SNORKEL IN |
| 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 |
|---|---|
| 599819I | Leidos, Inc. (USA) |
| Reference | Meaning |
|---|---|
| 20511265 | 3/9 Design control — primary reference Military Trucks & Parts, Inc. |
| 599819 | 5/9 Secondary reference Dana Commercial Vehicle Products, Llc |
| 20511265 | 5/9 Secondary reference Harsco Corporation Dba B M Y Wyne Wheled Vehicles Div |
| 20510450 | 5/9 Secondary reference Harsco Corporation Dba B M Y Wyne Wheled Vehicles Div |
NSN 4220-01-307-4779 is a Adapter,quick Connect and Discon, manufactured by Leidos, Inc., classified under FSC 4220, Marine Lifesaving and Diving Equipment. Status: active.
NSN 4220-01-307-4779 has 1 manufacturer part number on file: 599819I (Leidos, Inc.).
1 possible match (shared part number, not a government interchangeability claim): 3940-01-371-4270. Verify interchangeability with system specifications before substitution.
Key specifications for 599819I: General Characteristics Item Description: FOR 0.855 IN. MIN 0.895 IN. MAX ID HOSE; U/W SNORKEL IN; End Item Identification: 2320-01-230-0307. 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.