| 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 | ||||
| 5325-01-017-8809 (5325010178809) | 5330-01-278-3019 (5330012783019) | 5365-01-304-3832 (5365013043832) | 5305-15-060-1487 (5305150601487) | |
| 5305-01-361-3193 (5305013613193) | 5330-01-259-4088 (5330012594088) | 5340-01-672-8342 (5340016728342) | 5342-00-452-9798 (5342004529798) | |
| 5310-01-175-0629 (5310011750629) | 5330-01-120-4149 (5330011204149) | 5331-01-441-4577 (5331014414577) | 5330-01-425-8795 (5330014258795) | |
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