The Valve,safety Relief, cataloged under National Stock Number 4820-00-288-7280, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Emerson Automation Solutions Final Control Us Lp Div Navy Product Team. Government technical data includes 14 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-00-288-7280 |
| Primary Part Number | 2021400841M |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Emerson Automation Solutions Final Control Us Lp Div Navy Product Team |
| Status | ACTIVE |
| Flange Shape | ROUND WITH HOLES FIRST END |
| Flange Face Design | PLAIN FIRST END |
| Bolt Circle Nominal Diameter | 6.562 INCHES FIRST END IN |
| Connection Type | FLANGE FIRST END |
| Style Designator | ANGLE |
| Bolt Hole Nominal Diameter | 0.562 INCHES FIRST END IN |
| Operating Pressure | 5240.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Adjustable Pressure Range | +35.0 TO 50.0 POUNDS PER SQUARE INCH LBS |
| Nominal Outside Diameter | 7.688 INCHES FIRST END IN |
| Disk Loading Method | SPRING |
| Bolt Hole Quantity | 8 FIRST END |
| Material | COPPER ALLOY BODY |
| Material | NICKEL ALLOY STEM |
| Material | NICKEL ALLOY FLOW CONTROL DEVICE |
| 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 |
|---|---|
| BAMGG04SMM | Dante Valve Company (USA) |
| 2021400841M PRIMARY | Emerson Automation Solutions Final Control Us Lp Div Navy Product Team (USA) |
| DD445S4824-44ALT2 | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| BAMGG04SMM | 5/9 Secondary reference Danco Valve Company |
| DD445S4824-44ALT2 | 5/9 Secondary reference U.S. Government activity |
| 2021400841M | 5/9 Secondary reference Anderson Greenwood Lp Dba Anderson Greenwood Crosby |
| A6820A | 5/9 Secondary reference Anderson Greenwood Lp Dba Anderson Greenwood Crosby |
NSN 4820-00-288-7280 is a Valve,safety Relief, manufactured by Emerson Automation Solutions Final Control Us Lp Div Navy Product Team, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-288-7280 has 3 manufacturer part numbers on file: BAMGG04SMM (Dante Valve Company), 2021400841M (Emerson Automation Solutions Final Control Us Lp Div Navy Product Team), DD445S4824-44ALT2 (Naval Sea Systems Command).
Key specifications for 2021400841M: Flange Shape: ROUND WITH HOLES FIRST END; Flange Face Design: PLAIN FIRST END; Bolt Circle Nominal Diameter: 6.562 INCHES FIRST END IN; Connection Type: FLANGE FIRST END. 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.