| Item Name | Washer Key |
| INC Code | 01869 |
| Federal Supply Group (FSG) | Hardware and Abrasives |
| Federal Supply Class (FSC) | 5310 Nuts and Washers |
| National Item Identification Number (NIIN) | 01-013-4423 (010134423) |
| NCB Code | USA (01) |
| Manufacturer | Aerocontrolex Group Inc, Pht Aerospace Llc |
| MRC | Criteria | Characteristic |
|---|---|---|
| AAUB | HOLE DIAMETER | 0.404 INCHES MINIMUM AND 0.445 INCHES MAXIMUM |
| ABKV | OUTSIDE DIAMETER | 0.560 INCHES MINIMUM AND 0.570 INCHES MAXIMUM |
| ABLC | EXTERNAL STRAIGHT KEY WIDTH | 0.080 INCHES NOMINAL |
| ABLJ | INTERNAL STRAIGHT KEY WIDTH | 0.088 INCHES MINIMUM AND 0.092 INCHES MAXIMUM |
| ABLQ | DISTANCE FROM CENTERLINE TO TOP OF INTERNAL KEY | 0.167 INCHES MINIMUM AND 0.170 INCHES MAXIMUM |
| ABLX | OVERALL DISTANCE INCLUDING KEYS | 0.730 INCHES MINIMUM AND 0.740 INCHES MAXIMUM |
| ABMQ | EXTERNAL KEY QUANTITY | 11 |
| ABMR | INTERNAL KEY QUANTITY | 1 |
| ABPX | MATERIAL THICKNESS | 0.040 INCHES NOMINAL |
| MATT | MATERIAL | STEEL COMP 4130 OVERALL |
| MDCL | MATERIAL DOCUMENT AND CLASSIFICATION | MIL-S-18729 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| SFTT | SURFACE TREATMENT | TIN OVERALL |
| STYL | STYLE DESIGNATOR | KEY |
| Relevant Components for NSN - 5310-01-013-4423, 5310010134423 | ||||
| 5310-01-011-9703 (5310010119703) | 5310-01-631-4489 (5310016314489) | 5310-00-020-9053 (5310000209053) | 5310-01-041-3831 (5310010413831) | |
| 5310-01-180-5326 (5310011805326) | 5310-01-187-5440 (5310011875440) | 5310-00-092-6831 (5310000926831) | 5310-01-210-4885 (5310012104885) | |
| 5310-00-474-5240 (5310004745240) | 5310-00-474-3114 (5310004743114) | 5310-00-159-9146 (5310001599146) | 5310-01-528-9271 (5310015289271) | |
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ESD S20.20-2014 Certification |
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