The Valve,regulating,system Pressure, cataloged under National Stock Number 4820-01-593-4915, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier. Government technical data includes 2 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-593-4915 |
| Primary Part Number | 1559AS662-1 |
| Item Name | Valve,regulating,system Pressure |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier |
| Status | ACTIVE |
| Supplementary Features | MANUFACTURING PROCESS SHALL BE IN ACCORDANCE WITH THOSE SPECIFIED ON DWG 1559AS400 |
| Furnished Items | ADAPTER AND NUT AND INTERNAL BYPASS VALVE AND BRAZING RING |
| 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 |
|---|---|
| 1559AS662-1 PRIMARY | Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier (USA) |
| 1559AS662-1 | Snowbird Technologies Inc. (USA) |
NSN 4820-01-593-4915 is a Valve,regulating,system Pressure, manufactured by Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-593-4915 has 2 manufacturer part numbers on file: 1559AS662-1 (Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier), 1559AS662-1 (Snowbird Technologies Inc.).
Key specifications for 1559AS662-1: Supplementary Features: MANUFACTURING PROCESS SHALL BE IN ACCORDANCE WITH THOSE SPECIFIED ON DWG 1559AS400; Special Features: ASSEMBLY INCLUDES 1 EA OF P/N'S 1559AS663-1 VALVE, 1559AS142-2 NUT, 1559AS160-2 FITTING, 1559AS450-1 TUBING, 1559AS470-1ADAPTER, 1559AS169-2,TUBING 1559AS142-1 NUT. FLUX AND BRAZING ALLOY AS REQUIRED; Part Name Assigned by Controlling Agency: EXPANSION VALVE ASSEMBLY; End Item Identification: NHA - P/N 1559AS428. 2 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.