| Item Name | Washer Key |
| Federal Supply Group (FSG) | Hardware and Abrasives |
| Federal Supply Class (FSC) | 5310 Nuts and Washers |
| National Item Identification Number (NIIN) | 00-159-6281 (001596281) |
| NCB Code | USA (00) |
| Manufacturer | Military Standards Corp, Lockheed Martin Aeronautical Systems, Rolls Royce Corporation |
| MRC | Criteria | Characteristic |
|---|---|---|
| AAUB | HOLE DIAMETER | 0.515 INCHES MINIMUM AND 0.520 INCHES MAXIMUM |
| ABKV | OUTSIDE DIAMETER | 0.745 INCHES MINIMUM AND 0.755 INCHES MAXIMUM |
| ABKY | EXTERNAL PREBENT KEY LENGTH | 0.150 INCHES MINIMUM AND 0.160 INCHES MAXIMUM |
| ABLD | EXTERNAL TAPERED KEY WIDTH | 0.425 INCHES MINIMUM AND 0.435 INCHES MAXIMUM |
| ABLF | EXTERNAL PREBENT KEY WIDTH | 0.200 INCHES MINIMUM AND 0.205 INCHES MAXIMUM |
| ABLS | DISTANCE FROM CENTERLINE TO INSIDE OF PREBENT KEY | 0.465 INCHES MINIMUM AND 0.475 INCHES MAXIMUM |
| ABLX | OVERALL DISTANCE INCLUDING KEYS | 1.087 INCHES MINIMUM AND 1.115 INCHES MAXIMUM |
| ABMM | SPLIT KEY LENGTH | 0.215 INCHES MINIMUM AND 0.220 INCHES MAXIMUM |
| ABMQ | EXTERNAL KEY QUANTITY | 3 |
| ABPX | MATERIAL THICKNESS | 0.032 INCHES MINIMUM AND 0.040 INCHES MAXIMUM |
| CSFW | ANGLE BETWEEN EXTERNAL KEYS | 58.0 DEGREES MINIMUM AND 62.0 DEGREES MAXIMUM |
| CSKN | EXTERNAL PREBENT KEY ANGLE | 15.0 DEGREES NOMINAL |
| CSYM | SURFACE FINISH | 16.0 MICROINCHES TOP |
| CSYM | SURFACE FINISH | 32.0 MICROINCHES BOTTOM |
| 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 - 5310-00-159-6281, 5310001596281 | ||||
| 5355-00-871-8773 (5355008718773) | 5340-01-243-1107 (5340012431107) | 5315-01-506-6976 (5315015066976) | 5360-01-371-2450 (5360013712450) | |
| 5305-01-613-5639 (5305016135639) | 5330-01-519-5567 (5330015195567) | 5310-01-577-1001 (5310015771001) | 5342-01-650-6980 (5342016506980) | |
| 5325-01-544-9407 (5325015449407) | 5330-01-276-9620 (5330012769620) | 5340-01-659-7595 (5340016597595) | 5340-01-362-7603 (5340013627603) | |
If You’re Ever Looking for NSN parts Or Have an Aircraft On Ground Situation, Don’t forget That We offer Competitive Pricing and Guaranteed On-Time Delivery.
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