The Valve,check, cataloged under National Stock Number 4820-01-020-1040, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Hydro-Aire Aerospace Corp. Government technical data includes 1 verified specification, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 3 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-020-1040 |
| Primary Part Number | 38-491 |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — No Item Name Available |
| Manufacturer | Hydro-Aire Aerospace Corp |
| Status | ACTIVE |
| Flow Control Device | POPPET |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| 204-83519-1 | The Boeing Company Div Defense (USA) |
| 38-491 PRIMARY | Hydro-Aire Aerospace Corp (USA) |
NSN 4820-01-020-1040 is a Valve,check, manufactured by Hydro-Aire Aerospace Corp, classified under FSC 4820 (No Item Name Available). Status: active.
NSN 4820-01-020-1040 has 2 cross-referenced part numbers: 204-83519-1 (The Boeing Company Div Defense), 38-491 (Hydro-Aire Aerospace Corp).
There are 3 known substitutes for 4820-01-020-1040: 5961-00-438-2156, 4720-01-627-8783, 3010-01-710-5282. Verify interchangeability with system specifications before substitution.
Key specifications for 38-491: Flow Control Device: POPPET. 1 total characteristics are documented in the Federal Logistics Information System.