| Item Name | Washer Shouldered And Recessed |
| Federal Supply Group (FSG) | Hardware and Abrasives |
| Federal Supply Class (FSC) | 5310 Nuts and Washers |
| National Item Identification Number (NIIN) | 00-901-9830 (009019830) |
| NCB Code | USA (00) |
| Manufacturer | Eaton Corporation, Eaton Motor Site |
| MRC | Criteria | Characteristic |
|---|---|---|
| AAUB | HOLE DIAMETER | 2.678 INCHES MINIMUM AND 2.698 INCHES MAXIMUM |
| AAVH | SHOULDER DIAMETER | 2.774 INCHES MINIMUM AND 2.777 INCHES MAXIMUM |
| ABKV | OUTSIDE DIAMETER | 3.618 INCHES MINIMUM AND 3.623 INCHES MAXIMUM |
| ABMG | SHOULDER HEIGHT | 0.031 INCHES MINIMUM AND 0.036 INCHES MAXIMUM |
| ABPX | MATERIAL THICKNESS | 0.073 INCHES MINIMUM AND 0.083 INCHES MAXIMUM |
| CQFM | HARDNESS RATING | 44.0 ROCKWELL C MINIMUM AND 46.0 ROCKWELL C MAXIMUM |
| CSTM | RECESS ANGLE | 90.0 DEGREES NOMINAL |
| CSYM | SURFACE FINISH | 64.0 MICROINCHES ALL SURFACES |
| HEAT | HEAT TREATMENT | NORMALIZED |
| MATT | MATERIAL | STEEL COMP E4340 OVERALL |
| MDCL | MATERIAL DOCUMENT AND CLASSIFICATION | MIL-S-5000 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| STYL | STYLE DESIGNATOR | SHOULDERED AND RECESSED |
| Components Related to NSN - 5310-00-901-9830, 5310009019830 | ||||
| 5315-01-076-2969 (5315010762969) | 5325-00-543-3429 (5325005433429) | 5340-00-196-3675 (5340001963675) | 5360-01-424-6607 (5360014246607) | |
| 5310-00-084-4232 (5310000844232) | 5365-01-532-4588 (5365015324588) | 5340-01-654-3113 (5340016543113) | 5305-01-143-8635 (5305011438635) | |
| 5340-01-332-8256 (5340013328256) | 5360-00-558-5147 (5360005585147) | 5306-01-234-3071 (5306012343071) | 5305-01-175-6588 (5305011756588) | |
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