| Item Name | Washer Concave |
| Federal Supply Group (FSG) | Hardware and Abrasives |
| Federal Supply Class (FSC) | 5310 Nuts and Washers |
| National Item Identification Number (NIIN) | 00-975-2741 (009752741) |
| NCB Code | USA (00) |
| Manufacturer | Fitz Aerospace Llc, Harvard Industries Inc, National Aerospace Standards Com |
| MRC | Criteria | Characteristic |
|---|---|---|
| AAUB | HOLE DIAMETER | 0.435 INCHES MINIMUM AND 0.445 INCHES MAXIMUM |
| ABGG | RADIUS | 0.385 INCHES MINIMUM AND 0.415 INCHES MAXIMUM |
| ABKV | OUTSIDE DIAMETER | 0.640 INCHES MAXIMUM |
| ABMD | RECESS DIAMETER | 0.620 INCHES MAXIMUM |
| ABPX | MATERIAL THICKNESS | 0.105 INCHES MINIMUM AND 0.135 INCHES MAXIMUM |
| CQFM | HARDNESS RATING | 41.0 ROCKWELL C MINIMUM AND 48.0 ROCKWELL C MAXIMUM |
| MATT | MATERIAL | STEEL 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 | CONCAVE |
| ZZZK | SPECIFICATION/STANDARD DATA | 80205-NAS1288 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD |
| Relevant Components for NSN - 5310-00-975-2741, 5310009752741 | ||||
| 5320-01-093-5687 (5320010935687) | 5340-00-286-8500 (5340002868500) | 5310-00-797-4430 (5310007974430) | 5331-01-548-6940 (5331015486940) | |
| 5340-01-389-2408 (5340013892408) | 5340-01-499-3481 (5340014993481) | 5310-01-418-9739 (5310014189739) | 5320-01-419-8697 (5320014198697) | |
| 5340-01-681-6722 (5340016816722) | 5340-01-620-4639 (5340016204639) | 5340-01-481-2087 (5340014812087) | 5331-01-097-0869 (5331010970869) | |
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