The Valve,check, cataloged under National Stock Number 4820-01-475-6463, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Lockheed Martin Aeronautical Systems Support Company Dba Lmassc. Government technical data includes 5 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-475-6463 |
| Primary Part Number | MS28892-4AL |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Lockheed Martin Aeronautical Systems Support Company Dba Lmassc |
| Status | ACTIVE |
| Connection Type | THREADED EXTERNAL TUBE ALL ENDS |
| Style Designator | STRAIGHT THRU |
| Operating Pressure | 3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Media for Which Designed | HYDRAULIC FLUID, PETROLEUM BASE SINGLE RESPONSE |
| 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 |
|---|---|
| MS28892-4AL PRIMARY | Lockheed Martin Aeronautical Systems Support Company Dba Lmassc (USA) |
| Reference | Meaning |
|---|---|
| MS28892-4AL | 5/2 Secondary reference U.S. Government activity |
NSN 4820-01-475-6463 is a Valve,check, manufactured by Lockheed Martin Aeronautical Systems Support Company Dba Lmassc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-475-6463 has 1 manufacturer part number on file: MS28892-4AL (Lockheed Martin Aeronautical Systems Support Company Dba Lmassc).
1 possible match (shared part number, not a government interchangeability claim): 4820-01-485-3151. Verify interchangeability with system specifications before substitution.
Key specifications for MS28892-4AL: Connection Type: THREADED EXTERNAL TUBE ALL ENDS; Style Designator: STRAIGHT THRU; Operating Pressure: 3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS; Media for Which Designed: HYDRAULIC FLUID, PETROLEUM BASE SINGLE RESPONSE. 5 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.