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| Item Name | Valve Stop Check |
| Federal Supply Group (FSG) | Valves |
| Federal Supply Class (FSC) | 4820 Valves Nonpowered |
| National Item Identification Number (NIIN) | 00-202-6821 (002026821) |
| NCB Code | USA (00) |
| Manufacturer | Electric Boat Corporation, Derbyshire Machine And Tool Co |
| MRC | Criteria | Characteristic |
|---|---|---|
| ADQU | FLOW CONTROL DEVICE | DISK |
| ADSR | BONNET TYPE | INSIDE SCREW |
| ADST | BONNET ATTACHMENT METHOD | BOLTED |
| ADZH | RENEWABLE SEAT RING TYPE | THREADED |
| AQLR | VALVE OPERATION METHOD | MANUAL |
| ARKN | FLANGE SHAPE | ROUND 1ST END |
| AWLS | CONNECTION TYPE | FLANGE 1ST END |
| BBJX | MOUNTING POSITION | HORIZONTAL OR VERTICAL |
| CCFG | VALVE SIZE | 2.500 INCHES |
| CQGM | MAXIMUM OPERATING PRESSURE | 500.0 POUNDS PER SQUARE INCH SINGLE RESPONSE |
| CWCD | NOMINAL OUTSIDE DIAMETER | 6.125 INCHES 1ST END |
| CWCF | FACE TO FACE DISTANCE | 12.500 INCHES |
| CWCK | NOMINAL THICKNESS | 0.938 INCHES 1ST END |
| CWDF | FLANGE FACE DESIGN | PLAIN 1ST END |
| MATT | MATERIAL | COPPER ALLOY 903 BODY |
| MATT | MATERIAL | COPPER ALLOY 903 FLOW CONTROL DEVICE |
| MATT | MATERIAL | NICKEL ALLOY 400 SEAT OR NICKEL ALLOY R-405 SEAT |
| MATT | MATERIAL | NICKEL ALLOY 400 STEM OR NICKEL ALLOY R-405 STEM |
| MEDA | MEDIA FOR WHICH DESIGNED | WATER,SALT SINGLE RESPONSE |
| STYL | STYLE DESIGNATOR | STRAIGHT THRU FLANGED ENDS |
| ZZZY | REFERENCE NUMBER DIFFERENTIATING CHARACTERISTICS | ASDIFFERENTIATED BY ITEM NAME AND FLANGE SHAPE STYLE |
| Relevant Components for NSN - 4820-00-202-6821, 4820002026821 | ||||
| 4810-01-693-0546 (4810016930546) | 4810-01-224-8636 (4810012248636) | 4810-00-181-8826 (4810001818826) | 4810-00-533-2538 (4810005332538) | |
| 4820-01-319-3454 (4820013193454) | 4820-01-154-9733 (4820011549733) | 4810-01-176-9496 (4810011769496) | 4820-01-278-5449 (4820012785449) | |
| 4810-01-152-7681 (4810011527681) | 4810-00-127-2787 (4810001272787) | 4820-00-557-7800 (4820005577800) | 4810-01-469-1460 (4810014691460) | |
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