| Item Name | Washer Recessed |
| Federal Supply Group (FSG) | Hardware and Abrasives |
| Federal Supply Class (FSC) | 5310 Nuts and Washers |
| National Item Identification Number (NIIN) | 00-023-4771 (000234771) |
| NCB Code | USA (00) |
| Manufacturer | Paaesikunta Logistiikkaosasto, National Aerospace Standards, Maclean Fogg Company, Harvard Industries Inc |
| MRC | Criteria | Characteristic |
|---|---|---|
| AAUB | HOLE DIAMETER | 0.300 INCHES MINIMUM AND 0.310 INCHES MAXIMUM |
| ABKV | OUTSIDE DIAMETER | 0.457 INCHES MAXIMUM |
| ABMD | RECESS DIAMETER | 0.420 INCHES MINIMUM |
| ABPX | MATERIAL THICKNESS | 0.065 INCHES MINIMUM AND 0.095 INCHES MAXIMUM |
| CQFM | HARDNESS RATING | 41.0 ROCKWELL C MINIMUM AND 48.0 ROCKWELL C MAXIMUM |
| CSTM | RECESS ANGLE | 90.0 DEGREES NOMINAL |
| MATT | MATERIAL | STEEL COMP 601 OVERALL |
| MDCL | MATERIAL DOCUMENT AND CLASSIFICATION | AMS 6304 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| SFTT | SURFACE TREATMENT | NICKEL OVERALL AND ZINC OVERALL |
| STDC | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | AMS 2417 ASSN STD 1ST TREATMENT RESPONSE OVERALL AND AMS 2417 ASSN STD 2ND TREATMENT RESPONSE OVERALL |
| STYL | STYLE DESIGNATOR | RECESSED |
| Relevant Components for NSN - 5310-00-023-4771, 5310000234771 | ||||
| 5305-00-000-0094 (5305000000094) | 5305-00-001-1366 (5305000011366) | 5305-00-001-1367 (5305000011367) | 5305-00-001-1568 (5305000011568) | |
| 5305-00-001-1569 (5305000011569) | 5305-00-001-1837 (5305000011837) | 5305-00-001-1918 (5305000011918) | 5305-00-001-1926 (5305000011926) | |
| 5305-00-001-1948 (5305000011948) | 5305-00-001-1963 (5305000011963) | 5305-00-001-2011 (5305000012011) | 5305-00-001-2012 (5305000012012) | |
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