| Item Name | Washer Recessed |
| Federal Supply Group (FSG) | Hardware and Abrasives |
| Federal Supply Class (FSC) | 5310 Nuts and Washers |
| National Item Identification Number (NIIN) | 00-509-2129 (005092129) |
| NCB Code | USA (00) |
| Manufacturer | Fairbanks Morse Llc, Engineered Electric Company, Schwitzer Engine Components, Coltec Industries Inc, Napco International Llc |
| MRC | Criteria | Characteristic |
|---|---|---|
| AAUB | HOLE DIAMETER | 0.817 INCHES MINIMUM AND 0.822 INCHES MAXIMUM |
| ABKV | OUTSIDE DIAMETER | 1.434 INCHES MINIMUM AND 1.454 INCHES MAXIMUM |
| ABKW | OVERALL HEIGHT | 0.228 INCHES MINIMUM AND 0.248 INCHES MAXIMUM |
| ABMH | RECESS DEPTH | 0.178 INCHES MINIMUM AND 0.198 INCHES MAXIMUM |
| ABPX | MATERIAL THICKNESS | 0.050 INCHES NOMINAL |
| FEAT | SPECIAL FEATURES | ONE INTERNAL KEY WIDTH 0.234 AND LENGTH 0.125 |
| MATT | MATERIAL | STEEL OVERALL |
| STYL | STYLE DESIGNATOR | RECESSED |
| Relevant Components for NSN - 5310-00-509-2129, 5310005092129 | ||||
| 5320-01-318-6843 (5320013186843) | 5340-01-557-4760 (5340015574760) | 5340-00-336-3776 (5340003363776) | 5340-01-560-8528 (5340015608528) | |
| 5330-01-684-2979 (5330016842979) | 5310-01-185-8686 (5310011858686) | 5360-00-394-4491 (5360003944491) | 5320-01-267-6376 (5320012676376) | |
| 5315-00-432-8021 (5315004328021) | 5315-01-271-9296 (5315012719296) | 5340-01-353-1927 (5340013531927) | 5320-01-413-1816 (5320014131816) | |
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