The Valve,safety Relief, cataloged under National Stock Number 4820-00-528-2835, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is National Machine Company Dba Nmg Aerospace. Government technical data includes 23 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 4820-00-528-2835 |
| Primary Part Number | M9029DCD002 |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | National Machine Company Dba Nmg Aerospace |
| Status | ACTIVE |
| Flow Control Device | DISK |
| Connection Style | GASKET SEAL(BOSS) ALL ENDS |
| Connection Type | THREADED INTERNAL BOSS ALL ENDS |
| Style Designator | STRAIGHT THRU |
| Nominal Outside Diameter Tube Accommodated | 0.375 INCHES ALL ENDS IN |
| Operating Pressure | 975.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Features Provided | PRESSURE TIGHT OUTLET SIDE |
| Bonnet Type | INSIDE SCREW |
| Thread Direction | RIGHT-HAND ALL ENDS |
| Nominal Thread Size | 0.562 INCHES ALL ENDS IN |
| Maximum Operating Temp | 160.0 FAHRENHEIT SINGLE RESPONSE DEGF |
| Disk Loading Method | SPRING |
| Bonnet Attachment Method | INTEGRAL |
| Media for Which Designed | FUEL/OIL, HYDROCARBON SINGLE RESPONSE |
| Thread Class | 3B ALL ENDS |
| Material | STEEL CORROSION RESISTING FLOW CONTROL DEVICE |
| Material | STEEL CORROSION RESISTING SEAT |
| Material | ALUMINUM ALLOY BODY |
| Material | STEEL CORROSION RESISTING STEM |
| Thread Series Designator | UNF ALL ENDS |
| Opening Pressure Setting | 975.0 POUNDS PER SQUARE INCH LBS |
| Valve Discharge Flow Rate | 7.0 GALLONS PER MINUTE |
| 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 |
|---|---|
| M9029DCD002 | National Machine Company Dba Nmg Aerospace (USA) |
| Reference | Meaning |
|---|---|
| 10-3000-14 | 5/2 Secondary reference U.S. Government activity |
| A50070Z6 | 3/2 Design control — primary reference U.S. Government activity |
NSN 4820-00-528-2835 is a Valve,safety Relief, manufactured by National Machine Company Dba Nmg Aerospace, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-528-2835 has 1 manufacturer part number on file: M9029DCD002 (National Machine Company Dba Nmg Aerospace).
2 possible matches (shared part number, not a government interchangeability claim): 5330-01-209-4115, 4810-01-317-2728. Verify interchangeability with system specifications before substitution.
Key specifications for M9029DCD002: Flow Control Device: DISK; Connection Style: GASKET SEAL(BOSS) ALL ENDS; Connection Type: THREADED INTERNAL BOSS ALL ENDS; Style Designator: STRAIGHT THRU. 23 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.