The Valve,check, cataloged under National Stock Number 4820-00-202-5939, 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17 specifications, cited from the U.S. Government catalog. 20 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Cancelled.
| Parameter | Value |
|---|---|
| NSN | 4820-00-202-5939 |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | CANCELLED |
| Flow Control Device | DISK |
| Connection Style | INVERTED FLARE (TUBE) ALL ENDS |
| Mounting Position | HORIZONTAL |
| Connection Type | THREADED INTERNAL TUBE ALL ENDS |
| Style Designator | STRAIGHT THRU |
| Nominal Outside Diameter Tube Accommodated | 0.375 INCHES ALL ENDS IN |
| Operating Pressure | 75.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Thread Direction | RIGHT-HAND ALL ENDS |
| Nominal Thread Size | 0.562 INCHES ALL ENDS IN |
| Seat Angle | 60.0 DEGREES ALL ENDS |
| Maximum Operating Temp | 160.0 FAHRENHEIT SECOND RESPONSE DEGF |
| Maximum Operating Temp | -67.0 FAHRENHEIT FIRST RESPONSE DEGF |
| Surface Treatment | ANODIZE |
| Media for Which Designed | FUEL/OIL, HYDROCARBON SINGLE RESPONSE |
| Thread Class | 3B ALL ENDS |
| Material | ALUMINUM ALLOY OVERALL |
| Thread Series Designator | UNF ALL ENDS |
| Acquisition Status | CANCELLED |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| 4-1049-77 | 5/9 Secondary reference Parker-Hannifin Corporation Dba Pneutronics Div Corporate Headquarters |
| MS28882A-6 | 2/2 Government specification standardization U.S. Government activity |
| 3-1450-75 | 5/9 Secondary reference U.S. Government activity |
| 4820002025939 | 6/9 Informative reference only E.c.a Etablissement Central Des Approvisionnements Des Forces Armees Royales |
| 3-1450-77 | 5/9 Secondary reference U.S. Government activity |
| 3-1450-75 | 5/9 Secondary reference Parker-Hannifin Corporation Dba Pneutronics Div Corporate Headquarters |
| MIL-V-7899 | 5/9 Secondary reference U.S. Government activity |
| HE712-6 | 5/1 Secondary reference Grimes Aerospace Company |
| 1111-539014 | 5/9 Secondary reference U.S. Government activity |
| 37F65051 | 5/1 Secondary reference Northrop Grumman Systems Corporation |
| 593-6D1 | 5/9 Secondary reference U.S. Government activity |
| 3-1450-75 | 5/9 Secondary reference U.S. Government activity |
| MIL-DTL-7899 | 4/1 Identification reference U.S. Government activity |
| 593-6D1 | 5/1 Secondary reference Parker-Hannifin Corporation Dba Pneutronics Div Hydraulic Valve Division |
| 1111-539014 | 5/9 Secondary reference Parker-Hannifin Corporation Dba Pneutronics Div Corporate Headquarters |
| 3-1450-77 | 5/9 Secondary reference Parker-Hannifin Corporation Dba Pneutronics Div Corporate Headquarters |
| 3-1450-77 | 5/9 Secondary reference U.S. Government activity |
| 1111-539014 | 5/9 Secondary reference Parker-Hannifin Corporation Dba Pneutronics Div Hydraulic Valve Division |
| 4-1049-77 | 5/9 Secondary reference U.S. Government activity |
| 4-1049-77 | 5/9 Secondary reference U.S. Government activity |
NSN 4820-00-202-5939 is a Valve,check, classified under FSC 4820, Valves, Nonpowered. Status: cancelled.
1 possible match (shared part number, not a government interchangeability claim): 6220-01-644-1209. Verify interchangeability with system specifications before substitution.
Key specifications for 4820-00-202-5939: Flow Control Device: DISK; Connection Style: INVERTED FLARE (TUBE) ALL ENDS; Mounting Position: HORIZONTAL; Connection Type: THREADED INTERNAL TUBE ALL ENDS. 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.
NSN 4820-00-202-5939 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.
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.