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| Item Name | Seat Valve |
| Federal Supply Group (FSG) | Valves |
| Federal Supply Class (FSC) | 4820 Valves Nonpowered |
| National Item Identification Number (NIIN) | 01-050-2176 (010502176) |
| NCB Code | USA (01) |
| Manufacturer | Eaton Aerospace Ltd |
| MRC | Criteria | Characteristic |
|---|---|---|
| ABKK | FLANGE DIAMETER | 0.7490 INCHES MINIMUM AND 0.7495 INCHES MAXIMUM |
| ABKW | OVERALL HEIGHT | 0.625 INCHES MINIMUM AND 0.626 INCHES MAXIMUM |
| ADAR | BODY OUTSIDE DIAMETER | 0.635 INCHES MINIMUM AND 0.638 INCHES MAXIMUM |
| CQFM | HARDNESS RATING | 43.0 ROCKWELL C MINIMUM OVERALL AND 47.0 ROCKWELL C MAXIMUM OVERALL |
| CQKM | SEATING SURFACE SHAPE | FLAT |
| CQKW | BODY STEPPED INSIDE DIAMETER | 0.375 INCHES NOMINAL SECOND STEP |
| CQKW | BODY STEPPED INSIDE DIAMETER | 0.395 INCHES MINIMUM FIRST STEP AND 0.405 INCHES MAXIMUM FIRST STEP |
| CRTL | CRITICALITY CODE JUSTIFICATION | ABKK |
| MATT | MATERIAL | STEEL COMP 440C OVERALL OR STEEL COMP 440F OVERALL |
| MDCL | MATERIAL DOCUMENT AND CLASSIFICATION | QQ-S-763 FED SPEC SINGLE MATERIAL RESPONSE OVERALL OR AMS5630 ASSN STD SINGLE MATERIAL RESPONSE OVERALL OR AMS5623 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Relevant Components for NSN - 4820-01-050-2176, 4820010502176 | ||||
| 4810-01-693-0546 (4810016930546) | 4810-01-224-8636 (4810012248636) | 4810-00-181-8826 (4810001818826) | 4810-00-533-2538 (4810005332538) | |
| 4820-01-319-3454 (4820013193454) | 4820-01-154-9733 (4820011549733) | 4810-01-176-9496 (4810011769496) | 4820-01-278-5449 (4820012785449) | |
| 4810-01-152-7681 (4810011527681) | 4810-00-127-2787 (4810001272787) | 4820-00-557-7800 (4820005577800) | 4810-01-469-1460 (4810014691460) | |
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