| Item Name | Valve Safety Relief |
| Federal Supply Group (FSG) | Valves |
| Federal Supply Class (FSC) | 4820 Valves Nonpowered |
| National Item Identification Number (NIIN) | 00-289-1789 (002891789) |
| NCB Code | USA (00) |
| Manufacturer | Military Specifications, Dresser Industries Inc |
| MRC | Criteria | Characteristic |
|---|---|---|
| AAAR | NOMINAL PIPE SIZE ACCOMMODATED | 0.500 INCHES 1ST END |
| AAJF | THREAD DIRECTION | RIGHT-HAND 1ST END |
| ADQU | FLOW CONTROL DEVICE | DISK |
| ADSR | BONNET TYPE | EXPOSED SPRING |
| ADST | BONNET ATTACHMENT METHOD | BOLTED |
| ADSU | DISK LOADING METHOD | SPRING |
| ADZH | RENEWABLE SEAT RING TYPE | THREADED |
| AECS | BOLT HOLE QUANTITY | 4 2ND END |
| AEHZ | MAXIMUM OPERATING TEMP | 400.0 DEG FAHRENHEIT SINGLE RESPONSE |
| AHNC | CONNECTION STYLE | PLAIN,OPTIONAL END(PIPE) 1ST END |
| AQLR | VALVE OPERATION METHOD | AUTOMATIC OR MANUAL |
| ARKN | FLANGE SHAPE | ROUND WITH HOLES 2ND END |
| AWLS | CONNECTION TYPE | FLANGE 2ND END |
| AWLS | CONNECTION TYPE | THREADED INTERNAL PIPE 1ST END |
| CBBL | FEATURES PROVIDED | VALVE STEM LOCK SHIELD |
| CMLP | THREAD QUANTITY PER INCH | 14 1ST END |
| CQCY | ADJUSTABLE PRESSURE RANGE | 91.0 TO 144.0 POUNDS PER SQUARE INCH |
| CQGM | MAXIMUM OPERATING PRESSURE | 300.0 POUNDS PER SQUARE INCH SINGLE RESPONSE |
| CQJX | NOMINAL THREAD SIZE | 0.500 INCHES 1ST END |
| CWCD | NOMINAL OUTSIDE DIAMETER | 3.750 INCHES 2ND END |
| CWCK | NOMINAL THICKNESS | 0.562 INCHES 2ND END |
| CWCL | FIRST CONNECTION FACE TO CENTERLINE DISTANCE | 3.750 INCHES |
| CWCQ | BOLT HOLE NOMINAL DIAMETER | 0.562 INCHES 2ND END |
| CWCR | SECOND CONNECTION FACE TO CENTERLINE DISTANCE | 1.812 INCHES |
| CWCT | BOLT CIRCLE NOMINAL DIAMETER | 2.625 INCHES 2ND END |
| CWDF | FLANGE FACE DESIGN | RAISED STRAIGHT 2ND END |
| CWDH | RAISED FACE NOMINAL HEIGHT | 0.250 INCHES 2ND END |
| CWDL | RAISED FACE NOMINAL DIAMETER | 2.000 INCHES 2ND END |
| MATT | MATERIAL | NICKEL ALLOY FLOW CONTROL DEVICE |
| MATT | MATERIAL | STEEL CORROSION RESISTING SEAT |
| MATT | MATERIAL | STEEL CORROSION RESISTING STEM |
| MATT | MATERIAL | STEEL UNS J03008 BODY |
| MDCL | MATERIAL DOCUMENT AND CLASSIFICATION | MIL-S-15083 MIL SPEC SINGLE MATERIAL RESPONSE BODY |
| MEDA | MEDIA FOR WHICH DESIGNED | STEAM SINGLE RESPONSE |
| STYL | STYLE DESIGNATOR | ANGLE FLANGED ENDS |
| THSD | THREAD SERIES DESIGNATOR | NPT 1ST END |
| TMQY | FURNISHED ITEMS AND QUANTITY | 1 SIGHT GAGE |
| ZZZT | NONDEFINITIVE SPEC/STD DATA | 1 TYPE AND D COMPOSITION |
| Relevant Components for NSN - 4820-00-289-1789, 4820002891789 | ||||
| 4820-01-695-0145 (4820016950145) | 4820-01-596-1771 (4820015961771) | 4810-01-187-3363 (4810011873363) | 4810-01-523-6894 (4810015236894) | |
| 4820-00-707-0356 (4820007070356) | 4820-01-568-0815 (4820015680815) | 4820-01-227-9365 (4820012279365) | 4820-01-104-8145 (4820011048145) | |
| 4820-01-299-5713 (4820012995713) | 4820-01-640-9566 (4820016409566) | 4810-01-346-0666 (4810013460666) | 4820-01-655-5932 (4820016555932) | |
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