| Item Name | Washer Key |
| Federal Supply Group (FSG) | Hardware and Abrasives |
| Federal Supply Class (FSC) | 5310 Nuts and Washers |
| National Item Identification Number (NIIN) | 00-737-7401 (007377401) |
| NCB Code | USA (00) |
| Manufacturer | General Motors Corp |
| MRC | Criteria | Characteristic |
|---|---|---|
| ABKY | EXTERNAL PREBENT KEY LENGTH | 0.178 INCHES MINIMUM AND 0.198 INCHES MAXIMUM |
| ABLB | INTERNAL PREBENT KEY LENGTH | 0.396 INCHES MINIMUM AND 0.416 INCHES MAXIMUM |
| ABLK | INTERNAL PREBENT KEY WIDTH | 0.334 INCHES MINIMUM AND 0.354 INCHES MAXIMUM |
| ABMQ | EXTERNAL KEY QUANTITY | 3 |
| ABMR | INTERNAL KEY QUANTITY | 1 |
| AAUB | HOLE DIAMETER | 2.646 INCHES MINIMUM AND 2.666 INCHES MAXIMUM |
| ABKV | OUTSIDE DIAMETER | 3.062 INCHES NOMINAL |
| ABLF | EXTERNAL PREBENT KEY WIDTH | 0.209 INCHES MINIMUM AND 0.229 INCHES MAXIMUM |
| ABLQ | DISTANCE FROM CENTERLINE TO TOP OF INTERNAL KEY | 1.203 INCHES NOMINAL |
| ABLS | DISTANCE FROM CENTERLINE TO INSIDE OF PREBENT KEY | 1.709 INCHES MINIMUM AND 1.729 INCHES MAXIMUM |
| ABLX | OVERALL DISTANCE INCLUDING KEYS | 3.557 INCHES NOMINAL |
| ABPX | MATERIAL THICKNESS | 0.0538 INCHES MINIMUM AND 0.0658 INCHES MAXIMUM |
| CSRB | INTERNAL PREBENT KEY ANGLE | 89.7 DEGREES MINIMUM AND 90.3 DEGREES MAXIMUM |
| MATT | MATERIAL | STEEL COMP 1010 OVERALL |
| MDCL | MATERIAL DOCUMENT AND CLASSIFICATION | ASTM A108 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Relevant Components for NSN - 5310-00-737-7401, 5310007377401 | ||||
| 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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