| Item Name | Washer Keyway |
| Federal Supply Group (FSG) | Hardware and Abrasives |
| Federal Supply Class (FSC) | 5310 Nuts and Washers |
| National Item Identification Number (NIIN) | 00-290-5766 (002905766) |
| NCB Code | USA (00) |
| Manufacturer | Caterpillar Inc, Ambac International Corporation, United Technologies Corporation |
| MRC | Criteria | Characteristic |
|---|---|---|
| AAUB | HOLE DIAMETER | 0.440 INCHES MINIMUM AND 0.443 INCHES MAXIMUM |
| ABKV | OUTSIDE DIAMETER | 1.416 INCHES MINIMUM AND 1.426 INCHES MAXIMUM |
| ABLM | INTERNAL KEYWAY WIDTH | 0.096 INCHES MINIMUM AND 0.100 INCHES MAXIMUM |
| ABLR | DISTANCE FROM CENTERLINE TO BOTTOM OF INTERNAL KEYWAY | 0.330 INCHES NOMINAL |
| ABMV | INTERNAL KEYWAY QUANTITY | 1 |
| ABPX | MATERIAL THICKNESS | 0.020 INCHES NOMINAL |
| FEAT | SPECIAL FEATURES | 0.047 IN. BY 0.188 IN. LG SLOT 0.047 IN. FROM END OF WASHER ON TOP OF KEYWAY |
| MATT | MATERIAL | STEEL OVERALL |
| SFTT | SURFACE TREATMENT | CADMIUM OVERALL |
| Relevant Components for NSN - 5310-00-290-5766, 5310002905766 | ||||
| 5320-01-093-5687 (5320010935687) | 5340-00-286-8500 (5340002868500) | 5310-00-797-4430 (5310007974430) | 5331-01-548-6940 (5331015486940) | |
| 5340-01-389-2408 (5340013892408) | 5340-01-499-3481 (5340014993481) | 5310-01-418-9739 (5310014189739) | 5320-01-419-8697 (5320014198697) | |
| 5340-01-681-6722 (5340016816722) | 5340-01-620-4639 (5340016204639) | 5340-01-481-2087 (5340014812087) | 5331-01-097-0869 (5331010970869) | |
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