The Valve,expansion, cataloged under National Stock Number 4820-01-468-9891, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Atmost Refrigeration Company, Inc. Div Atmost Refrigeration. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 4820-01-468-9891 |
| Primary Part Number | AA 1/2 MC |
| Item Name | Valve,expansion |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Atmost Refrigeration Company, Inc. Div Atmost Refrigeration |
| Status | ACTIVE |
| 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 |
|---|---|
| AA 1/2 MC PRIMARY | Atmost Refrigeration Company, Inc. Div Atmost Refrigeration (USA) |
| Reference | Meaning |
|---|---|
| NAV-65-HT-B ITEM 8 | 5/9 Secondary reference Atmost Refrigeration Company, Inc. Div Atmost Refrigeration |
NSN 4820-01-468-9891 is a Valve,expansion, manufactured by Atmost Refrigeration Company, Inc. Div Atmost Refrigeration, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-468-9891 has 1 manufacturer part number on file: AA 1/2 MC (Atmost Refrigeration Company, Inc. Div Atmost Refrigeration).
Key specifications for AA 1/2 MC: Special Features: NHA REFRIGERATOR; NAV-65-HT-B; End Item Identification: NIMITZ CLASS CVN. 0 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.