AS9120B, ISO 9001:2015, and FAA AC 0056B Accredited
| Item Name | Washer Key |
| Federal Supply Group (FSG) | Hardware and Abrasives |
| Federal Supply Class (FSC) | 5310 Nuts and Washers |
| National Item Identification Number (NIIN) | 00-709-2543 (007092543) |
| NCB Code | USA (00) |
| Manufacturer | Triple A Spring Limited, United Technologies Corporation, Alinabal Holdings Corporation |
| MRC | Criteria | Characteristic |
|---|---|---|
| AAUB | HOLE DIAMETER | 0.515 INCHES MINIMUM AND 0.525 INCHES MAXIMUM |
| ABKV | OUTSIDE DIAMETER | 0.705 INCHES MINIMUM AND 0.715 INCHES MAXIMUM |
| ABKY | EXTERNAL PREBENT KEY LENGTH | 0.112 INCHES MINIMUM AND 0.140 INCHES MAXIMUM |
| ABLD | EXTERNAL TAPERED KEY WIDTH | 0.400 INCHES MINIMUM AND 0.410 INCHES MAXIMUM |
| ABLF | EXTERNAL PREBENT KEY WIDTH | 0.170 INCHES MINIMUM AND 0.175 INCHES MAXIMUM |
| ABLS | DISTANCE FROM CENTERLINE TO INSIDE OF PREBENT KEY | 0.412 INCHES MINIMUM AND 0.422 INCHES MAXIMUM |
| ABLX | OVERALL DISTANCE INCLUDING KEYS | 0.990 INCHES MINIMUM AND 1.018 INCHES MAXIMUM |
| ABMM | SPLIT KEY LENGTH | 0.190 INCHES MINIMUM AND 0.195 INCHES MAXIMUM |
| ABMQ | EXTERNAL KEY QUANTITY | 1 |
| ABPX | MATERIAL THICKNESS | 0.033 INCHES MINIMUM AND 0.041 INCHES MAXIMUM |
| CSKN | EXTERNAL PREBENT KEY ANGLE | 20.0 DEGREES MINIMUM AND 40.0 DEGREES MAXIMUM |
| MATT | MATERIAL | STEEL COMP 321 OVERALL |
| MDCL | MATERIAL DOCUMENT AND CLASSIFICATION | AMS 5510 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| STYL | STYLE DESIGNATOR | KEY |
| Relevant Components for NSN - 5310-00-709-2543, 5310007092543 | ||||
| 5305-00-825-1285 (5305008251285) | 5315-01-177-1845 (5315011771845) | 5340-01-536-0624 (5340015360624) | 5330-01-398-3824 (5330013983824) | |
| 5365-00-602-2520 (5365006022520) | 5340-01-658-6711 (5340016586711) | 5306-00-488-7520 (5306004887520) | 5310-00-443-4905 (5310004434905) | |
| 5305-00-579-4230 (5305005794230) | 5306-01-488-3599 (5306014883599) | 5340-01-429-0378 (5340014290378) | 5305-01-208-9074 (5305012089074) | |
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