| Item Name | Washer Recessed |
| Federal Supply Group (FSG) | Hardware and Abrasives |
| Federal Supply Class (FSC) | 5310 Nuts and Washers |
| National Item Identification Number (NIIN) | 00-521-4028 (005214028) |
| NCB Code | USA (00) |
| Manufacturer | Boeing Company The |
| MRC | Criteria | Characteristic |
|---|---|---|
| AAUB | HOLE DIAMETER | 0.762 INCHES MINIMUM AND 0.770 INCHES MAXIMUM |
| ABKV | OUTSIDE DIAMETER | 1.344 INCHES MINIMUM AND 1.406 INCHES MAXIMUM |
| ABMD | RECESS DIAMETER | 0.891 INCHES MINIMUM AND 0.911 INCHES MAXIMUM |
| ABPX | MATERIAL THICKNESS | 0.115 INCHES MINIMUM AND 0.135 INCHES MAXIMUM |
| CQFM | HARDNESS RATING | 35.0 ROCKWELL C MINIMUM AND 40.0 ROCKWELL C MAXIMUM |
| CSTM | RECESS ANGLE | 89.5 DEGREES MINIMUM AND 90.5 DEGREES MAXIMUM |
| MATT | MATERIAL | STEEL COMP 4130 OVERALL |
| MDCL | MATERIAL DOCUMENT AND CLASSIFICATION | MIL-S-6758 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| SFTT | SURFACE TREATMENT | CADMIUM OVERALL |
| STYL | STYLE DESIGNATOR | RECESSED |
| Components Related to NSN - 5310-00-521-4028, 5310005214028 | ||||
| 5305-01-222-7769 (5305012227769) | 5365-01-044-5936 (5365010445936) | 5331-01-276-7349 (5331012767349) | 5340-00-536-5281 (5340005365281) | |
| 5365-00-550-5464 (5365005505464) | 5305-01-209-8688 (5305012098688) | 5340-01-624-2067 (5340016242067) | 5340-01-214-3681 (5340012143681) | |
| 5330-01-166-9520 (5330011669520) | 5306-00-528-5534 (5306005285534) | 5307-00-307-2340 (5307003072340) | 5340-01-382-3018 (5340013823018) | |
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