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| Item Name | Valve Poppet Engine |
| Federal Supply Group (FSG) | Engines Turbines and Components |
| Federal Supply Class (FSC) | 2815 Diesel Engines and Components |
| National Item Identification Number (NIIN) | 01-057-6639 (010576639) |
| NCB Code | USA (01) |
| Manufacturer | Cummins Incorporated |
| MRC | Criteria | Characteristic |
|---|---|---|
| AASK | HEAD STYLE | FLAT |
| AASU | HEAD HEIGHT | 0.2656 INCHES MINIMUM AND 0.2750 INCHES MAXIMUM |
| AATE | CHAMFER ANGLE IN DEG | 45.0 |
| AAVZ | GROOVE DIAMETER | 0.4220 INCHES MINIMUM AND 0.4280 INCHES MAXIMUM |
| AAZP | CHAMFER LENGTH | 0.0100 INCHES MINIMUM AND 0.0250 INCHES MAXIMUM |
| ABGF | GROOVE WIDTH | 0.1320 INCHES MINIMUM AND 0.1420 INCHES MAXIMUM |
| ABKV | OUTSIDE DIAMETER | 2.2150 INCHES MINIMUM AND 2.2250 INCHES MAXIMUM |
| AJFY | SEAT ANGLE IN DEG | 30.0 |
| ALYX | STEM STYLE | GROOVED |
| ALYZ | CARBON RELIEF GROOVE | NOT INCLUDED |
| ALZB | NECK RADIUS | 0.7900 INCHES MINIMUM AND 0.8100 INCHES MAXIMUM |
| ALZD | STEM LENGTH | 7.2730 INCHES MINIMUM AND 7.2870 INCHES MAXIMUM |
| ALZE | STEM DIAMETER | 0.4945 INCHES MINIMUM AND 0.4955 INCHES MAXIMUM |
| ALZG | DISTANCE FROM GROOVE TO STEM END | 0.4600 INCHES NOMINAL |
| ANNQ | MATERIAL AND LOCATION | STEEL OVERALL |
| ASXJ | METALLIC HARDNESS RATING AND LOCATION | 52.0 ROCKWELL C MINIMUM TIP |
| Relevant Components for NSN - 2815-01-057-6639, 2815010576639 | ||||
| 2825-00-790-8901 (2825007908901) | 2825-01-010-8535 (2825010108535) | 2825-00-371-7811 (2825003717811) | 2805-01-264-5598 (2805012645598) | |
| 2840-01-375-6452 (2840013756452) | 2805-01-130-2594 (2805011302594) | 2835-01-234-6845 (2835012346845) | 2805-01-714-1073 (2805017141073) | |
| 2840-00-837-2120 (2840008372120) | 2840-01-708-1715 (2840017081715) | 2840-01-200-9553 (2840012009553) | 2805-00-710-5355 (2805007105355) | |
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