| Item Name | Washer Lock |
| Federal Supply Group (FSG) | Hardware and Abrasives |
| Federal Supply Class (FSC) | 5310 Nuts and Washers |
| National Item Identification Number (NIIN) | 00-638-4552 (006384552) |
| NCB Code | USA (00) |
| Manufacturer | Aeronautical Standards Group, David Round Company The, Federal Specifications, Northrop Grumman Systems Corporation |
| MRC | Criteria | Characteristic |
|---|---|---|
| AAUB | HOLE DIAMETER | 0.116 INCHES MINIMUM AND 0.123 INCHES MAXIMUM |
| ABKV | OUTSIDE DIAMETER | 0.255 INCHES MINIMUM AND 0.270 INCHES MAXIMUM |
| ABPX | MATERIAL THICKNESS | 0.014 INCHES MINIMUM AND 0.018 INCHES MAXIMUM |
| CQFM | HARDNESS RATING | 85.0 ROCKWELL B MINIMUM AND 95.0 ROCKWELL B MAXIMUM |
| MATT | MATERIAL | COPPER ALLOY 240 OVERALL OR COPPER ALLOY 425 OVERALL |
| MDCL | MATERIAL DOCUMENT AND CLASSIFICATION | QQ-B-750 FED SPEC 1ST MATERIAL RESPONSE OVERALL OR ASTM B36 UNS C24000 ASSN STD 1ST MATERIAL RESPONSE OVERALL OR CDA 425 ASSN STD 2ND MATERIAL RESPONSE OVERALL OR ASTM B591 UNS C42500 ASSN STD 2ND MATERIAL RESPONSE OVERALL |
| SFTT | SURFACE TREATMENT | CADMIUM OVERALL AND CHROMATE OVERALL |
| STDC | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-B-426,TYPE 2,CLASS 3 FED SPEC ALL TREATMENT RESPONSES OVERALL |
| STYL | STYLE DESIGNATOR | FLAT INTERNAL TEETH |
| ZZZK | SPECIFICATION/STANDARD DATA | 81348-FF-W-100 GOVERNMENT SPECIFICATION AND 88044-AN936/CANCELED/ GOVERNMENT STANDARD |
| ZZZT | NONDEFINITIVE SPEC/STD DATA | 1 TYPE AND A GRADE AND 1 STYLE AND 3 COMPOSITION OR 4 COMPOSITION |
| ZZZW | DEPARTURE FROM CITED DOCUMENT | AS MODIFIED BY CADMIUM W/ CHROMATE PLATING |
| Relevant Components for NSN - 5310-00-638-4552, 5310006384552 | ||||
| 5325-01-474-4172 (5325014744172) | 5305-00-005-0050 (5305000050050) | 5305-01-081-2450 (5305010812450) | 5360-00-248-8834 (5360002488834) | |
| 5340-01-369-8169 (5340013698169) | 5305-00-899-3578 (5305008993578) | 5330-00-593-8695 (5330005938695) | 5305-01-514-9340 (5305015149340) | |
| 5340-01-702-5703 (5340017025703) | 5360-00-920-9595 (5360009209595) | 5340-01-691-6457 (5340016916457) | 5306-01-269-7435 (5306012697435) | |
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