| Item Name | Washer Key |
| Federal Supply Group (FSG) | Hardware and Abrasives |
| Federal Supply Class (FSC) | 5310 Nuts and Washers |
| National Item Identification Number (NIIN) | 01-055-2838 (010552838) |
| NCB Code | USA (01) |
| Manufacturer | British Aerospace Holdings Inc, United Technologies Corporation, Tokyo Judoi Kogyo K K, Tokyo Judogi Kogyo Co, The United Tool And Die Company |
| MRC | Criteria | Characteristic |
|---|---|---|
| AAUB | HOLE DIAMETER | 0.390 INCHES MINIMUM AND 0.395 INCHES MAXIMUM |
| ABKV | OUTSIDE DIAMETER | 0.546 INCHES MINIMUM AND 0.556 INCHES MAXIMUM |
| ABLF | EXTERNAL PREBENT KEY WIDTH | 0.180 INCHES MINIMUM AND 0.200 INCHES MAXIMUM |
| ABLK | INTERNAL PREBENT KEY WIDTH | 0.140 INCHES MINIMUM AND 0.150 INCHES MAXIMUM |
| ABLX | OVERALL DISTANCE INCLUDING KEYS | 1.150 INCHES MINIMUM AND 1.170 INCHES MAXIMUM |
| ABPX | MATERIAL THICKNESS | 0.038 INCHES MINIMUM AND 0.048 INCHES MAXIMUM |
| MATT | MATERIAL | STEEL OVERALL |
| MDCL | MATERIAL DOCUMENT AND CLASSIFICATION | AMS5510 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Relevant Components for NSN - 5310-01-055-2838, 5310010552838 | ||||
| 5320-01-318-6843 (5320013186843) | 5340-01-557-4760 (5340015574760) | 5340-00-336-3776 (5340003363776) | 5340-01-560-8528 (5340015608528) | |
| 5330-01-684-2979 (5330016842979) | 5310-01-185-8686 (5310011858686) | 5360-00-394-4491 (5360003944491) | 5320-01-267-6376 (5320012676376) | |
| 5315-00-432-8021 (5315004328021) | 5315-01-271-9296 (5315012719296) | 5340-01-353-1927 (5340013531927) | 5320-01-413-1816 (5320014131816) | |
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