| Item Name | Valve Safety Relief |
| Federal Supply Group (FSG) | Valves |
| Federal Supply Class (FSC) | 4820 Valves Nonpowered |
| National Item Identification Number (NIIN) | 01-256-0662 (012560662) |
| NCB Code | USA (01) |
| Manufacturer | Coltec Industries Inc, Fairbanks Morse Llc |
| MRC | Criteria | Characteristic |
|---|---|---|
| ADQU | FLOW CONTROL DEVICE | PLUG |
| AECS | BOLT HOLE QUANTITY | 8 ALL ENDS |
| AQLR | VALVE OPERATION METHOD | AUTOMATIC |
| ARKN | FLANGE SHAPE | ROUND WITH HOLES ALL ENDS |
| AWLS | CONNECTION TYPE | FLANGE ALL ENDS |
| CCFG | VALVE SIZE | 3.000 INCHES |
| CSDC | OPENING PRESSURE SETTING | 20.0 POUNDS PER SQUARE INCH |
| CWCD | NOMINAL OUTSIDE DIAMETER | 6.625 INCHES ALL ENDS |
| CWCK | NOMINAL THICKNESS | 0.188 INCHES ALL ENDS |
| CWCL | FIRST CONNECTION FACE TO CENTERLINE DISTANCE | 5.250 INCHES |
| CWCQ | BOLT HOLE NOMINAL DIAMETER | 0.562 INCHES ALL ENDS |
| CWCR | SECOND CONNECTION FACE TO CENTERLINE DISTANCE | 5.250 INCHES |
| CWCT | BOLT CIRCLE NOMINAL DIAMETER | 5.500 INCHES ALL ENDS |
| CWDF | FLANGE FACE DESIGN | PLAIN ALL ENDS |
| MATT | MATERIAL | STEEL BODY |
| STYL | STYLE DESIGNATOR | ANGLE FLANGED ENDS |
| Relevant Components for NSN - 4820-01-256-0662, 4820012560662 | ||||
| 4820-01-478-7250 (4820014787250) | 4820-01-157-2874 (4820011572874) | 4820-01-152-3022 (4820011523022) | 4820-00-622-4732 (4820006224732) | |
| 4820-01-521-9794 (4820015219794) | 4820-01-396-0684 (4820013960684) | 4820-01-450-7273 (4820014507273) | 4820-01-124-2752 (4820011242752) | |
| 4820-01-233-6840 (4820012336840) | 4820-00-495-7877 (4820004957877) | 4820-01-708-6366 (4820017086366) | 4820-00-220-3237 (4820002203237) | |
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