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| Item Name | Washer Key |
| Federal Supply Group (FSG) | Hardware and Abrasives |
| Federal Supply Class (FSC) | 5310 Nuts and Washers |
| National Item Identification Number (NIIN) | 00-638-1740 (006381740) |
| NCB Code | USA (00) |
| Manufacturer | Lockheed Martin Corporation, Tossco Inc, Bell Helicopter Textron Inc |
| Part Number | Manufacturer | Item Name | RFQ |
|---|---|---|---|
| 47-661-040-1 | lockheed martin corporation | washer key | RFQ |
| T638-1740 | tossco inc | washer key | RFQ |
| 47-661-040-1 | bell helicopter textron inc | washer key | RFQ |
| MRC | Criteria | Characteristic |
|---|---|---|
| AAUB | HOLE DIAMETER | 0.885 INCHES NOMINAL |
| ABKV | OUTSIDE DIAMETER | 1.200 INCHES NOMINAL |
| ABLC | EXTERNAL STRAIGHT KEY WIDTH | 0.200 INCHES NOMINAL |
| ABLJ | INTERNAL STRAIGHT KEY WIDTH | 0.160 INCHES NOMINAL |
| ABLQ | DISTANCE FROM CENTERLINE TO TOP OF INTERNAL KEY | 0.320 INCHES NOMINAL |
| ABLX | OVERALL DISTANCE INCLUDING KEYS | 1.650 INCHES NOMINAL |
| ABMQ | EXTERNAL KEY QUANTITY | 4 |
| ABMR | INTERNAL KEY QUANTITY | 2 |
| ABPX | MATERIAL THICKNESS | 0.040 INCHES NOMINAL |
| CSKN | EXTERNAL PREBENT KEY ANGLE | 30.0 DEGREES NOMINAL |
| FEAT | SPECIAL FEATURES | TWO SETS OF EXTNERAL KEYS UNEQUALLY SPACED,FIRST EXTERNA KEY 30 DEG FROM INTERNAL KEY AND SECOND EXTERNAL KEY 60 DEG FROM INTERNAL KEY WITH OPPOSITE SET OF EXTERNAL KAY 180 DEG APART |
| MATT | MATERIAL | STEEL OVERALL |
| MDCL | MATERIAL DOCUMENT AND CLASSIFICATION | QQ-S-698 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| SFTT | SURFACE TREATMENT | CADMIUM OVERALL |
| STYL | STYLE DESIGNATOR | KEY |
| Relevant Components for NSN - 5310-00-638-1740, 5310006381740 | ||||
| 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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