The Valve,check, cataloged under National Stock Number 4820-00-600-7420, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 25 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 4820-00-600-7420 |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| Flow Control Device | DISK |
| Flange Shape | RECTANGULAR WITH HOLES SECOND END |
| Flange Shape | RECTANGULAR WITH HOLES FIRST END |
| Flange Face Design | RECESSED WITH GASKET GROOVE ALL ENDS |
| Nominal Length | 3.000 INCHES FIRST END IN |
| Nominal Length | 2.437 INCHES SECOND END IN |
| Mounting Position | HORIZONTAL |
| Style Designator | ANGLE |
| Bolt Hole Nominal Diameter | 0.312 INCHES FIRST END IN |
| Bolt Hole Nominal Diameter | 0.281 INCHES SECOND END IN |
| Nominal Thread Size | 0.500 INCHES FIRST END IN |
| Center to Center Nominal Distance Between Bolt Holes Along Width | 1.812 INCHES ALL ENDS IN |
| Second Connection Face to Centerline Distance | 1.437 INCHES IN |
| Disk Loading Method | SPRING |
| Bolt Hole Quantity | 4 SECOND END |
| Bolt Hole Quantity | 4 FIRST END |
| Surface Treatment | ANODIZE |
| Nominal Width | 3.000 INCHES ALL ENDS IN |
| Center to Center Nominal Distance Between Bolt Holes Along Length | 2.375 INCHES FIRST END IN |
| Center to Center Nominal Distance Between Bolt Holes Along Length | 1.812 INCHES SECOND END IN |
| Thread Class | 2B ALL ENDS |
| First Connection Face to Centerline Distance | 5.750 INCHES IN |
| Thread Series Designator | NPT FIRST END |
| Nominal Thickness | 0.312 INCHES FIRST END IN |
| Nominal Thickness | 0.250 INCHES SECOND 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 |
|---|---|
| 10-60526-1 | 5/2 Secondary reference U.S. Government activity |
| 325300 | 3/2 Design control — primary reference U.S. Government activity |
NSN 4820-00-600-7420 is a Valve,check, classified under FSC 4820, Valves, Nonpowered. Status: active.
2 possible matches (shared part number, not a government interchangeability claim): 2510-01-096-9665, 2541-01-526-6545. Verify interchangeability with system specifications before substitution.
Key specifications for 4820-00-600-7420: Flow Control Device: DISK; Flange Shape: RECTANGULAR WITH HOLES SECOND END; Flange Shape: RECTANGULAR WITH HOLES FIRST END; Flange Face Design: RECESSED WITH GASKET GROOVE ALL ENDS. 25 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.