The Valve,check, cataloged under National Stock Number 4820-00-438-8462, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 30 specifications, cited from the U.S. Government catalog. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 7 items share a part number with this NSN in the catalog (possible match — not a government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 | 4820-00-438-8462 |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| Flow Control Device | POPPETPOPPET |
| Surface Treatment Document and Classification | MIL-A-8625,TY 1 MIL SPEC SINGLE TREATMENT RESPONSE |
| Connection Style | FLARED (TUBE) FIRST ENDFLARED (TUBE) FIRST END |
| Connection Style | FLARELESS SECOND ENDFLARELESS SECOND END |
| Mounting Position | HORIZONTAL OR HORIZONTAL OR VERTICALVERTICAL |
| Connection Type | THREADED EXTERNAL TUBE SECOND ENDTHREADED EXTERNAL TUBE SECOND END |
| Connection Type | THREADED EXTERNAL TUBE FIRST ENDTHREADED EXTERNAL TUBE FIRST END |
| Style Designator | STRAIGHT THRU |
| Material Document and Classification | QQ-A-225/6,ALLOY 2024,T4 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Outside Diameter Tube Accommodated | 0.188 INCHES SECOND END IN |
| Nominal Outside Diameter Tube Accommodated | 0.188 INCHES SECOND END0.188 INCHES FIRST END IN |
| Operating Pressure | 600.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Thread Direction | RIGHT-HAND SECOND ENDRIGHT-HAND SECOND END |
| Thread Direction | RIGHT-HAND FIRST ENDRIGHT-HAND FIRST END |
| Nominal Thread Size | 0.375 INCHES FIRST END0.375 INCHES FIRST END IN |
| Nominal Thread Size | 0.375 INCHES SECOND END0.375 INCHES SECOND END IN |
| Seat Angle | 12.0 DEGREES SECOND END |
| Seat Angle | 12.0 DEGREES SECOND END37.0 DEGREES FIRST END |
| Maximum Operating Temp | 180.0 FAHRENHEIT SINGLE RESPONSE180.0 FAHRENHEIT SINGLE RESPONSE DEGF |
| Disk Loading Method | SPRINGSPRING |
| Surface Treatment | ANODIZE |
| Media for Which Designed | ALCOHOL, ETHYL FIFTH RESPONSE |
| Media for Which Designed | ALCOHOL, ETHYL FIFTH RESPONSEETHYLENE GLYCOL FOURTH RESPONSE |
| Media for Which Designed | CARBON DIOXIDE THIRD RESPONSEFUEL/OIL, HYDROCARBON SECOND RESPONSE |
| Media for Which Designed | ETHYLENE GLYCOL FOURTH RESPONSECARBON DIOXIDE THIRD RESPONSE |
| Media for Which Designed | FUEL/OIL, HYDROCARBON SECOND RESPONSEAIR FIRST RESPONSE |
| Thread Class | 3A SECOND END3A SECOND END A |
| Thread Class | 3A FIRST END3A FIRST END A |
| Thread Quantity Per Inch | 24 FIRST END24 FIRST END |
| Thread Quantity Per Inch | 24 SECOND END24 SECOND END |
| 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 |
|---|---|
| 212-411 | 7/2 Vendor item drawing reference U.S. Government activity |
| Z02CV03-1 | 5/9 Secondary reference Zevco Inc |
| 869A3TEL | 3/2 Design control — primary reference U.S. Government activity |
| Z02CV03-1 | 3/2 Design control — primary reference U.S. Government activity |
NSN 4820-00-438-8462 is a Valve,check, classified under FSC 4820, Valves, Nonpowered. Status: active.
7 possible matches (shared part number, not a government interchangeability claim): 5360-01-465-1767, 4820-01-691-2409, 4820-01-691-2943. Verify interchangeability with system specifications before substitution.
Key specifications for 4820-00-438-8462: Flow Control Device: POPPETPOPPET; Surface Treatment Document and Classification: MIL-A-8625,TY 1 MIL SPEC SINGLE TREATMENT RESPONSE; Connection Style: FLARED (TUBE) FIRST ENDFLARED (TUBE) FIRST END; Connection Style: FLARELESS SECOND ENDFLARELESS SECOND END. 30 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.