The Valve,lift-Check, cataloged under National Stock Number 4820-01-128-4159, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is The Boeing Company Div Defense. Government technical data includes 10 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 4820-01-128-4159 |
| Primary Part Number | ST7M375-4A |
| Item Name | Valve,lift-Check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Flow Control Device | DISK |
| Mounting Position | VERTICAL |
| Style Designator | STRAIGHT THRU |
| Operating Pressure | 3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Maximum Operating Temp | 275.0 FAHRENHEIT SINGLE RESPONSE DEGF |
| Media for Which Designed | HYDRAULIC FLUID, MINERAL BASE SINGLE RESPONSE |
| Material | ALUMINUM ALLOY 2024 BODY |
| Material | STEEL COMP 440C SEAT |
| Material | STEEL COMP 440C FLOW CONTROL DEVICE |
| Valve Operation Method | MANUAL |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| ST7M375-4A | The Boeing Company Div Defense (USA) |
| Reference | Meaning |
|---|---|
| 10124583 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
| 53270-1 | 3/2 Design control — primary reference U.S. Government activity |
| ST7M375 | 5/9 Secondary reference The Boeing Company Div Defense |
NSN 4820-01-128-4159 is a Valve,lift-Check, manufactured by The Boeing Company Div Defense, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-128-4159 has 1 manufacturer part number on file: ST7M375-4A (The Boeing Company Div Defense).
2 possible matches (shared part number, not a government interchangeability claim): 4820-01-425-1019, 4940-01-460-0055. Verify interchangeability with system specifications before substitution.
Key specifications for ST7M375-4A: Flow Control Device: DISK; Mounting Position: VERTICAL; Style Designator: STRAIGHT THRU; Operating Pressure: 3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS. 10 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 4820-01-128-4159 has DEMIL Code Q. Demilitarization may be required before disposal or transfer to non-military entities.
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.