The Valve,check, cataloged under National Stock Number 4820-01-494-3494, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Parker-Hannifin Corporation Dba Climate Systems Division Div Climate Systems Division Copper & As. Government technical data includes 14 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-494-3494 |
| Primary Part Number | 274037-13 |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Parker-Hannifin Corporation Dba Climate Systems Division Div Climate Systems Division Copper & As |
| Status | ACTIVE |
| Flow Control Device | BALL |
| Connection Style | SOCKET (TUBE) SECOND END |
| Connection Style | SOCKET (TUBE) FIRST END |
| Mounting Position | HORIZONTAL OR VERTICAL |
| Connection Type | UNTHREADED INTERNAL TUBE FIRST END |
| Connection Type | UNTHREADED INTERNAL TUBE SECOND END |
| Style Designator | STRAIGHT THRU |
| Nominal Outside Diameter Tube Accommodated | 0.625 INCHES FIRST END IN |
| Nominal Outside Diameter Tube Accommodated | 0.500 INCHES SECOND END IN |
| Disk Loading Method | SPRING |
| Material | COPPER BODY |
| Material | COPPER FLOW CONTROL DEVICE |
| Material | COPPER ALLOY SEAT |
| Valve Operation Method | AUTOMATIC |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 274037-13 PRIMARY | Parker-Hannifin Corporation Dba Climate Systems Division Div Climate Systems Division Copper & As (USA) |
| Reference | Meaning |
|---|---|
| AF-9454217 | 5/9 Secondary reference Hdt Expeditionary Systems Inc |
| 274150-00 | 5/9 Secondary reference U.S. Government activity |
| 274150-00 | 5/9 Secondary reference Parker-Hannifin Corporation Dba Climate Systems Division Div Climate Systems Division Copper & As |
| 9454217 | 5/9 Secondary reference U.S. Government activity |
| 9454217 | 5/9 Secondary reference U.S. Government activity |
NSN 4820-01-494-3494 is a Valve,check, manufactured by Parker-Hannifin Corporation Dba Climate Systems Division Div Climate Systems Division Copper & As, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-494-3494 has 1 manufacturer part number on file: 274037-13 (Parker-Hannifin Corporation Dba Climate Systems Division Div Climate Systems Division Copper & As).
Key specifications for 274037-13: Flow Control Device: BALL; Connection Style: SOCKET (TUBE) SECOND END; Connection Style: SOCKET (TUBE) FIRST END; Mounting Position: HORIZONTAL OR VERTICAL. 14 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.