The Valve,check, cataloged under National Stock Number 4820-00-741-2985, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Military Vehicles Opn General Motors Truck and Bus Group Ms 2603-02. Government technical data includes 15 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers 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through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 4820-00-741-2985 |
| Primary Part Number | 1551288 |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Military Vehicles Opn General Motors Truck and Bus Group Ms 2603-02 |
| Status | ACTIVE |
| Flow Control Device | POPPET |
| Connection Style | PLAIN, OPTIONAL END (PIPE) FIRST END |
| Connection Style | PLAIN (PIPE) SECOND END |
| Mounting Position | HORIZONTAL OR VERTICAL |
| Connection Type | THREADED INTERNAL PIPE FIRST END |
| Connection Type | THREADED EXTERNAL PIPE SECOND END |
| Style Designator | STRAIGHT THRU |
| Thread Direction | RIGHT-HAND SECOND END |
| Thread Direction | RIGHT-HAND FIRST END |
| Nominal Thread Size | 0.250 INCHES FIRST END IN |
| Nominal Thread Size | 0.250 INCHES SECOND END IN |
| Disk Loading Method | SPRING |
| Thread Series Designator | NPTF SECOND END |
| Thread Series Designator | NPSF FIRST END |
| 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 |
|---|---|
| 7412985 | U S Army Tank Automotive Command Amsta-Im-Mm (USA) |
| 1551288 PRIMARY | Military Vehicles Opn General Motors Truck and Bus Group Ms 2603-02 (USA) |
| Reference | Meaning |
|---|---|
| 1551288 | 5/9 Secondary reference General Motors Corp |
| 6421789 | C/1 Advisory reference — outside the item-of-supply concept General Motors Llc Dba General Motors Llc |
| 6421789 | 5/9 Secondary reference General Motors Llc Dba General Motors |
| 1551288 | 5/9 Secondary reference General Motors Llc Dba General Motors |
| 1551288 | C/1 Advisory reference — outside the item-of-supply concept General Motors Llc Dba General Motors Llc |
NSN 4820-00-741-2985 is a Valve,check, manufactured by Military Vehicles Opn General Motors Truck and Bus Group Ms 2603-02, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-741-2985 has 2 manufacturer part numbers on file: 7412985 (U S Army Tank Automotive Command Amsta-Im-Mm), 1551288 (Military Vehicles Opn General Motors Truck and Bus Group Ms 2603-02).
Key specifications for 1551288: Flow Control Device: POPPET; Connection Style: PLAIN, OPTIONAL END (PIPE) FIRST END; Connection Style: PLAIN (PIPE) SECOND END; Mounting Position: HORIZONTAL OR VERTICAL. 15 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.