The Valve Assembly,anti, cataloged under National Stock Number 4820-01-428-3559, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Rolls-Royce Corporation. The record lists 2 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 4820-01-428-3559 |
| Primary Part Number | 23089960 |
| Item Name | Valve Assembly,anti |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Rolls-Royce Corporation |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 23089960 PRIMARY | Rolls-Royce Corporation (USA) |
| 23089960 | Leonardo Spa Helicopters Division - Production Site (ITA) |
| Reference | Meaning |
|---|---|
| 10164671 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
| 23053192 | 5/9 Secondary reference Allison Transmission Inc Dba Allison Transmission, Inc |
| 23053192 | 5/9 Secondary reference Rolls-Royce Corporation |
NSN 4820-01-428-3559 is a Valve Assembly,anti, manufactured by Rolls-Royce Corporation, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-428-3559 has 2 manufacturer part numbers on file: 23089960 (Rolls-Royce Corporation), 23089960 (Leonardo Spa Helicopters Division - Production Site).
Key specifications for 23089960: End Item Identification: T63-A-700 AND T63-A-720 (TURBINE ENGINE). 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.
NSN 4820-01-428-3559 has DEMIL Code Q. Demilitarization may be required before disposal or transfer to non-military entities.
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.