| 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 | Nimikkeistokeskus Ncb Finland, Fitz Aerospace Llc, Harvard Industries Inc, National Aerospace Standards Com |
| 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 |
| Components Related to NSN - 5310-00-023-4771, 5310000234771 | ||||
| 5310-01-197-4020 (5310011974020) | 5315-01-603-3457 (5315016033457) | 5307-00-208-2583 (5307002082583) | 5306-00-723-0855 (5306007230855) | |
| 5306-01-051-8024 (5306010518024) | 5365-00-997-7495 (5365009977495) | 5360-00-769-7461 (5360007697461) | 5360-01-313-5636 (5360013135636) | |
| 5330-01-455-6923 (5330014556923) | 5340-00-061-1146 (5340000611146) | 5320-00-333-6513 (5320003336513) | 5310-01-109-8086 (5310011098086) | |
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