The Valve,check, cataloged under National Stock Number 4820-01-447-4582, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 17 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-447-4582 |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| Flange Shape | RECTANGULAR WITH HOLES FIRST END |
| Flange Face Design | PLAIN FIRST END |
| Nominal Length | 3.188 INCHES FIRST END IN |
| Mounting Position | HORIZONTAL |
| Connection Type | UNTHREADED INTERNAL TUBE SECOND END |
| Connection Type | FLANGE FIRST END |
| Style Designator | STRAIGHT THRU |
| Bolt Hole Nominal Diameter | 0.285 INCHES FIRST END IN |
| Nominal Outside Diameter Tube Accommodated | 2.000 INCHES SECOND END IN |
| Maximum Operating Temp | 74.0 CELSIUS SINGLE RESPONSE DEGC |
| Center to Center Nominal Distance Between Bolt Holes Along Width | 2.800 INCHES FIRST END IN |
| Bolt Hole Quantity | 4 FIRST END |
| Nominal Width | 3.376 INCHES FIRST END IN |
| Center to Center Nominal Distance Between Bolt Holes Along Length | 2.588 INCHES FIRST END IN |
| Media for Which Designed | FUEL/OIL, HYDROCARBON SINGLE RESPONSE |
| Valve Operation Method | AUTOMATIC |
| Nominal Thickness | 0.200 INCHES FIRST END IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| 0131420100-1 | 3/2 Design control — primary reference U.S. Government activity |
| 17B6D1359 | 7/1 Vendor item drawing reference U.S. Government activity |
| 17B6D1359-1 | 5/2 Secondary reference U.S. Government activity |
NSN 4820-01-447-4582 is a Valve,check, classified under FSC 4820, Valves, Nonpowered. Status: active.
2 possible matches (shared part number, not a government interchangeability claim): 4820-01-447-4583, 4820-01-447-4586. Verify interchangeability with system specifications before substitution.
Key specifications for 4820-01-447-4582: Flange Shape: RECTANGULAR WITH HOLES FIRST END; Flange Face Design: PLAIN FIRST END; Nominal Length: 3.188 INCHES FIRST END IN; Mounting Position: HORIZONTAL. 17 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.