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) | 00-639-3563 (006393563) |
| NCB Code | USA (00) |
| Manufacturer | Raytheon Company, Motorola Inc, Northrop Grumman Systems Corporation, General Dynamics Mission Systems |
| MRC | Criteria | Characteristic |
|---|---|---|
| AAUB | HOLE DIAMETER | 1.317 INCHES MINIMUM AND 1.323 INCHES MAXIMUM |
| ABKV | OUTSIDE DIAMETER | 1.406 INCHES MINIMUM AND 1.469 INCHES MAXIMUM |
| ABLB | INTERNAL PREBENT KEY LENGTH | 0.062 INCHES NOMINAL |
| ABLC | EXTERNAL STRAIGHT KEY WIDTH | 0.090 INCHES NOMINAL |
| ABLK | INTERNAL PREBENT KEY WIDTH | 0.105 INCHES MINIMUM AND 0.120 INCHES MAXIMUM |
| ABLX | OVERALL DISTANCE INCLUDING KEYS | 1.1531 INCHES NOMINAL |
| ABMQ | EXTERNAL KEY QUANTITY | 4 |
| ABPX | MATERIAL THICKNESS | 0.014 INCHES MINIMUM AND 0.016 INCHES MAXIMUM |
| CRZL | ANGLE BETWEEN FIRST AND SECOND KEY | 22.5 DEGREES NOMINAL |
| CSHK | ANGLE BETWEEN SECOND AND THIRD KEY | 22.5 DEGREES NOMINAL |
| CSKN | EXTERNAL PREBENT KEY ANGLE | 90.0 DEGREES NOMINAL |
| CSNP | ANGLE BETWEEN THIRD AND FOURTH KEY | 22.5 DEGREES NOMINAL |
| CXCY | PART NAME ASSIGNED BY CONTROLLING AGENCY | NAVY SPECIAL PROJECT |
| FEAT | SPECIAL FEATURES | INTERNAL PRE-BENT KEY 180 DEG FROM SECOND EXTERNAL KEY |
| MATT | MATERIAL | STEEL COMP 4130 OVERALL |
| MDCL | MATERIAL DOCUMENT AND CLASSIFICATION | MIL-S-18729 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| SFTT | SURFACE TREATMENT | CADMIUM OVERALL |
| STYL | STYLE DESIGNATOR | KEY |
| Relevant Components for NSN - 5310-00-639-3563, 5310006393563 | ||||
| 5305-00-151-0390 (5305001510390) | 5305-00-162-0212 (5305001620212) | 5330-01-021-6193 (5330010216193) | 5306-01-667-2305 (5306016672305) | |
| 5305-00-702-7578 (5305007027578) | 5306-01-467-0619 (5306014670619) | 5340-14-507-0973 (5340145070973) | 5330-01-545-5049 (5330015455049) | |
| 5331-01-433-9967 (5331014339967) | 5330-01-176-0563 (5330011760563) | 5330-20-001-0516 (5330200010516) | 5305-00-550-9932 (5305005509932) | |
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