| Item Name | Valve Safety Relief |
| Federal Supply Group (FSG) | Valves |
| Federal Supply Class (FSC) | 4820 Valves Nonpowered |
| National Item Identification Number (NIIN) | 00-419-5838 (004195838) |
| NCB Code | USA (00) |
| Manufacturer | Circor Aerospace Inc, Lockheed Martin Corporation |
| MRC | Criteria | Characteristic |
|---|---|---|
| AAJD | THREAD CLASS | 3A 1ST END |
| AAJF | THREAD DIRECTION | RIGHT-HAND 1ST END |
| ADQU | FLOW CONTROL DEVICE | POPPET |
| ADSU | DISK LOADING METHOD | SPRING |
| ADSY | VALVE DISCHARGE FLOW RATE | 1.5 CUBIC FEET PER MINUTE |
| AEHZ | MAXIMUM OPERATING TEMP | -100.0 DEG FAHRENHEIT 1ST RESPONSE400.0 DEG FAHRENHEIT 2ND RESPONSE |
| AHNC | CONNECTION STYLE | PLAIN (TUBE) 1ST END |
| AQLR | VALVE OPERATION METHOD | AUTOMATIC |
| AWLS | CONNECTION TYPE | THREADED EXTERNAL TUBE 1ST END |
| CQGM | MAXIMUM OPERATING PRESSURE | 200.0 POUNDS PER SQUARE INCH SINGLE RESPONSE |
| CQJX | NOMINAL THREAD SIZE | 0.437 INCHES 1ST END |
| CSDC | OPENING PRESSURE SETTING | 65.0 POUNDS PER SQUARE INCH |
| CWFD | NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED | 0.250 INCHES 1ST END |
| FEAT | SPECIAL FEATURES | FURNISHED W/DEFECTOR CAP |
| MATT | MATERIAL | ALUMINUM ALLOY 2024 BODY |
| MATT | MATERIAL | ALUMINUM ALLOY 2024 FLOW CONTROL DEVICE |
| MATT | MATERIAL | ALUMINUM ALLOY 2024 SEAT |
| MDCL | MATERIAL DOCUMENT AND CLASSIFICATION | QQ-A-250/4,ALLOY 2024 FED SPEC SINGLE MATERIAL RESPONSE BODY |
| MDCL | MATERIAL DOCUMENT AND CLASSIFICATION | QQ-A-250/4,ALLOY 2024 FED SPEC SINGLE MATERIAL RESPONSE FLOW CONTROL DEVICE |
| MDCL | MATERIAL DOCUMENT AND CLASSIFICATION | QQ-A-250/4,ALLOY 2024 FED SPEC SINGLE MATERIAL RESPONSE SEAT |
| MEDA | MEDIA FOR WHICH DESIGNED | AIR 1ST RESPONSE |
| MEDA | MEDIA FOR WHICH DESIGNED | CARBON DIOXIDE 2ND RESPONSE |
| MEDA | MEDIA FOR WHICH DESIGNED | HELIUM 3RD RESPONSE |
| MEDA | MEDIA FOR WHICH DESIGNED | HYDROGEN 4TH RESPONSE |
| MEDA | MEDIA FOR WHICH DESIGNED | NITROGEN,GASEOUS 5TH RESPONSE |
| STYL | STYLE DESIGNATOR | STRAIGHT THRU W/BAFFLE |
| THSD | THREAD SERIES DESIGNATOR | UNJF 1ST END |
| Relevant Components for NSN - 4820-00-419-5838, 4820004195838 | ||||
| 4810-01-547-2012 (4810015472012) | 4820-01-698-0859 (4820016980859) | 4810-01-240-8588 (4810012408588) | 4820-01-380-2942 (4820013802942) | |
| 4820-01-226-2114 (4820012262114) | 4820-01-457-2193 (4820014572193) | 4820-01-420-4996 (4820014204996) | 4820-00-758-7343 (4820007587343) | |
| 4820-01-435-2099 (4820014352099) | 4810-01-178-7003 (4810011787003) | 4810-01-259-7300 (4810012597300) | 4820-01-200-8668 (4820012008668) | |
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