# NSN 4820-01-502-1447: Valve, Safety Relief

NSN 4820-01-502-1447 (also written 4820015021447; NIIN 01-502-1447) is a valve, safety relief in Federal Supply Class 4820, Valves, Nonpowered. 2 manufacturer part numbers from 1 supplier are on record. No purchases are on record yet.

## Identification

- NSN: 4820-01-502-1447 (4820015021447)
- NIIN: 01-502-1447 (015021447)
- Item name: VALVE,SAFETY RELIEF
- Federal Supply Class: [FSC 4820 Valves, Nonpowered](https://nsnexplorer.com/fsc/4820/)
- Federal Supply Group: [FSG 48](https://nsnexplorer.com/group/48/)
- Acquisition method suffix code: AMSC H: the government lacks sufficient, accurate or legible data to buy from other sources. (observed 2026-10-27)
- Acquisition method code: 3

## Characteristics

| Code | Requirement | Reply |
| --- | --- | --- |
| MATT | MATERIAL | BODY BRONZE |
| MATT | MATERIAL | FLOW CONTROL DEVICE NICKEL ALLOY |
| CWDF | FLANGE FACE DESIGN | ALL ENDS PLAIN |
| CXCY | PART NAME ASSIGNED BY CONTROLLING AGENCY | 4 X 4 MODLE L-2210-C RELIEF VALVE |
| ADST | BONNET ATTACHMENT METHOD | BOLTED |
| CSDC | OPENING PRESSURE SETTING | POUNDS PER SQUARE INCH 71.0 |
| CWCD | NOMINAL OUTSIDE DIAMETER | ALL ENDS INCHES 7.6875 |
| CWCK | NOMINAL THICKNESS | ALL ENDS INCHES 0.500 |
| CWCL | FIRST CONNECTION FACE TO CENTERLINE DISTANCE | INCHES 7.000 |
| MATT | MATERIAL | STEM NICKEL ALLOY |
| MDCL | MATERIAL DOCUMENT AND CLASSIFICATION | STEM ASSN STD SINGLE MATERIAL RESPONSE QQ-N-281 |
| MEDA | MEDIA FOR WHICH DESIGNED | SINGLE RESPONSE WATER, SALT |
| STYL | STYLE DESIGNATOR | — |
| ADQU | FLOW CONTROL DEVICE | DISK |
| CQCY | ADJUSTABLE PRESSURE RANGE | POUNDS PER SQUARE INCH 71.0 TO 100.0 |
| CQQF | OPERATING PRESSURE | SINGLE RESPONSE POUNDS PER SQUARE INCH (PSI) MAXIMUM 100.0 |
| CWCT | BOLT CIRCLE NOMINAL DIAMETER | ALL ENDS INCHES 6.5625 |
| AWLS | CONNECTION TYPE | ALL ENDS FLANGE |
| AZGM | MOUNTING FACILITY | BRACKET(S) |
| CCFG | VALVE SIZE | INCHES 4.000 |
| CWCQ | BOLT HOLE NOMINAL DIAMETER | ALL ENDS INCHES 0.5625 |
| CWCR | SECOND CONNECTION FACE TO CENTERLINE DISTANCE | INCHES 6.000 |
| AEHZ | MAXIMUM OPERATING TEMP | SINGLE RESPONSE FAHRENHEIT 425.0 |
| AQLR | VALVE OPERATION METHOD | AUTOMATIC OR MANUAL |
| ARKN | FLANGE SHAPE | ALL ENDS ROUND WITH HOLES |
| ADSU | DISK LOADING METHOD | SPRING |
| AECS | BOLT HOLE QUANTITY | 8 |
| ZZZK | SPECIFICATION/STANDARD DATA | GOVERNMENT SPECIFICATION 81349--IL-V-20065 TYE A-1 CLASS C |
| ADSR | BONNET TYPE | INSIDE SPRING |
| MDCL | MATERIAL DOCUMENT AND CLASSIFICATION | BODY MIL SPEC SINGLE MATERIAL RESPONSE -IL-B-16541 |
| MDCL | MATERIAL DOCUMENT AND CLASSIFICATION | FLOW CONTROL DEVICE ASSN STD SINGLE MATERIAL RESPONSE QQ-N-288 |

## Part numbers

| Part number | CAGE | Supplier | Source |
| --- | --- | --- | --- |
| L2210CNMP612REVC4IN71T100PSI | 01343 | ANDERSON GREENWOOD LP DBA ANDERSON GREENWOOD CROSBY | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| NMP-612 | 01343 | ANDERSON GREENWOOD LP DBA ANDERSON GREENWOOD CROSBY | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |

## Sources

- DLA DIBBS RFQs for this NSN: https://www.dibbs.bsm.dla.mil/RFQ/RFQNsn.aspx?value=4820015021447&category=nsn
- DLA DIBBS awards for this NSN: https://www.dibbs.bsm.dla.mil/Awards/AwdRecs.aspx?category=awdnsn&TypeSrch=cq&Value=4820015021447
- AMSC record: https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/
- All data is public U.S. government data; every row above links to its source record where one exists.

Canonical page: https://nsnexplorer.com/nsn/4820-01-502-1447/
JSON: https://nsnexplorer.com/api/nsn/4820-01-502-1447.json