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| Item Name | Seat Helical Compression Spring |
| Federal Supply Group (FSG) | Hardware and Abrasives |
| Federal Supply Class (FSC) | 5340 Hardware Commercial |
| National Item Identification Number (NIIN) | 00-721-5103 (007215103) |
| NCB Code | USA (00) |
| Manufacturer | Cummins Incorporated |
| MRC | Criteria | Characteristic |
|---|---|---|
| AATA | COUNTERSINK ANGLE IN DEG | 45.0 |
| AATE | CHAMFER ANGLE IN DEG | 7.0 |
| AAWY | COUNTERBORE DIAMETER | 0.6600 INCHES NOMINAL |
| ABKW | OVERALL HEIGHT | 0.3030 INCHES MINIMUM AND 0.3530 INCHES MAXIMUM |
| ABPR | FIRST STEP DIAMETER | 0.7400 INCHES MINIMUM AND 0.7500 INCHES MAXIMUM |
| ABPS | FIRST STEP LENGTH | 0.0470 INCHES MINIMUM AND 0.0770 INCHES MAXIMUM |
| ABPT | SECOND STEP DIAMETER | 1.0500 INCHES MINIMUM AND 1.0700 INCHES MAXIMUM |
| AJFY | SEAT ANGLE IN DEG | 80.0 |
| ALME | MATERIAL HARDNESS RATING | 30.0 ROCKWELL B MINIMUM AND 65.0 ROCKWELL B MAXIMUM |
| AMFZ | SECOND END DIAMETER | 1.0400 INCHES NOMINAL |
| APGF | DESIGN TYPE | SOLID |
| AYRZ | COUNTERSINK DIAMETER | 0.4850 INCHES NOMINAL |
| BBRB | END DIAMETER | 0.5200 INCHES MINIMUM AND 0.5400 INCHES MAXIMUM |
| BYYF | BORE TAPER IN DEG | 7.0 |
| BZDL | COUNTERBORE LENGTH | 0.0470 INCHES NOMINAL |
| FEAT | SPECIAL FEATURES | MATL-STEEL FED-STD-66 AISI/SAE 1010;NOT CASEHARDENED |
| MATT | MATERIAL | STEEL |
| STYL | STYLE DESIGNATOR | SEAT |
| ABXV | BORE DIAMETER | 0.4325 INCHES NOMINAL |
| BZDH | DISTANCE FROM END TO FIRST STEP | 0.1260 INCHES MINIMUM AND 0.1860 INCHES MAXIMUM |
| ZZZV | FSC APPLICATION DATA | CYLINDER HEAD ASSY,DIESEL ENGINE |
| Relevant Components for NSN - 5340-00-721-5103, 5340007215103 | ||||
| 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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