| Item Name | Washer Key |
| Federal Supply Group (FSG) | Hardware and Abrasives |
| Federal Supply Class (FSC) | 5310 Nuts and Washers |
| National Item Identification Number (NIIN) | 01-146-6149 (011466149) |
| NCB Code | USA (01) |
| Manufacturer | Navair And Navsea Managed |
| MRC | Criteria | Characteristic |
|---|---|---|
| AATB | WIDTH BETWEEN FLATS | 0.532 INCHES MINIMUM AND 0.542 INCHES MAXIMUM |
| AAUB | HOLE DIAMETER | 0.630 INCHES MINIMUM AND 0.645 INCHES MAXIMUM |
| ABKV | OUTSIDE DIAMETER | 0.880 INCHES NOMINAL |
| ABLF | EXTERNAL PREBENT KEY WIDTH | 0.190 INCHES NOMINAL |
| MATT | MATERIAL | COPPER ALLOY 260 OVERALL |
| MDCL | MATERIAL DOCUMENT AND CLASSIFICATION | QQ-B-626,TEMPER HALF HARD FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| SFTT | SURFACE TREATMENT | TIN OVERALL |
| STDC | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | ASTM B545 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| Relevant Components for NSN - 5310-01-146-6149, 5310011466149 | ||||
| 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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