The Valve,safety Relief, cataloged under National Stock Number 4820-01-386-1705, 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 Dba Marine Product Team Div Marine Product Team. Government technical data includes 14 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through both NSN and commercial part number lookups. 7 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-386-1705 |
| Primary Part Number | 0020-E01-MG0051 |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Emerson Automation Solutions Final Control Us Lp Dba Marine Product Team Div Marine Product Team |
| Status | ACTIVE |
| Flow Control Device | DISK |
| Connection Style | PLAIN,OPTIONAL END(PIPE) SECOND END |
| Connection Style | PLAIN (PIPE) FIRST END |
| Connection Type | THREADED INTERNAL PIPE SECOND END |
| Connection Type | THREADED EXTERNAL PIPE FIRST END |
| Style Designator | ANGLE |
| Operating Pressure | 300.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Adjustable Pressure Range | +51.0 TO 70.0 POUNDS PER SQUARE INCH LBS |
| Thread Direction | RIGHT-HAND ALL ENDS |
| Nominal Thread Size | 1.000 INCHES ALL ENDS IN |
| Maximum Operating Temp | 300.0 FAHRENHEIT SINGLE RESPONSE DEGF |
| Material | BRONZE BODY |
| Thread Series Designator | NPT ALL ENDS |
| 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 |
|---|---|
| 002-E01-MG0051 | Emerson Automation Solutions Final Control Us Lp Dba Marine Product Team Div Marine Product Team (USA) |
| 0020-E01-MG0051 PRIMARY | Emerson Automation Solutions Final Control Us Lp Dba Marine Product Team Div Marine Product Team (USA) |
| Reference | Meaning |
|---|---|
| TBB-E01-MC0051 | 5/9 Secondary reference Kunkle Industries Inc Lonergan Valve Div |
| 043080-00 | C/1 Advisory reference — outside the item-of-supply concept Curtiss-Wright Electro-Mechanical Corporation Div Epd |
| TBB-E01-MC | C/1 Advisory reference — outside the item-of-supply concept Kunkle Industries Inc Lonergan Valve Div |
| RY-19222 REV. A ITEM 20 | 5/9 Secondary reference U.S. Government activity |
| RY-19222 REV. A ITEM 20 | C/1 Advisory reference — outside the item-of-supply concept Curtiss-Wright Electro-Mechanical Corporation Div Epd |
| 043080-00 | 5/9 Secondary reference U.S. Government activity |
| TBB-E01-MC0051 | 3/9 Design control — primary reference Anderson Greenwood Lp Dba Anderson Greenwood Crosby |
NSN 4820-01-386-1705 is a Valve,safety Relief, manufactured by Emerson Automation Solutions Final Control Us Lp Dba Marine Product Team Div Marine Product Team, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-386-1705 has 2 manufacturer part numbers on file: 002-E01-MG0051 (Emerson Automation Solutions Final Control Us Lp Dba Marine Product Team Div Marine Product Team), 0020-E01-MG0051 (Emerson Automation Solutions Final Control Us Lp Dba Marine Product Team Div Marine Product Team).
Key specifications for 0020-E01-MG0051: Flow Control Device: DISK; Connection Style: PLAIN,OPTIONAL END(PIPE) SECOND END; Connection Style: PLAIN (PIPE) FIRST END; Connection Type: THREADED INTERNAL PIPE SECOND 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.