AS9120B, ISO 9001:2015, and FAA AC 0056B Accredited
| 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) | 00-021-5583 (000215583) |
| NCB Code | USA (00) |
| Manufacturer | Eaton Aerospace Ltd, General Signal Corp |
| MRC | Criteria | Characteristic |
|---|---|---|
| AAWY | COUNTERBORE DIAMETER | 0.0620 INCHES NOMINAL |
| ABKW | OVERALL HEIGHT | 0.4550 INCHES NOMINAL |
| ABPR | FIRST STEP DIAMETER | 0.2280 INCHES MINIMUM AND 0.2320 INCHES MAXIMUM |
| ABPS | FIRST STEP LENGTH | 0.0950 INCHES NOMINAL |
| ABPT | SECOND STEP DIAMETER | 0.4580 INCHES NOMINAL |
| ABXV | BORE DIAMETER | 0.1990 INCHES MINIMUM AND 0.2040 INCHES MAXIMUM |
| ALME | MATERIAL HARDNESS RATING | 58.0 ROCKWELL C MINIMUM AND 60.0 ROCKWELL C MAXIMUM |
| APGF | DESIGN TYPE | SOLID |
| BBRB | END DIAMETER | 0.2100 INCHES NOMINAL |
| BZDH | DISTANCE FROM END TO FIRST STEP | 0.2670 INCHES NOMINAL |
| BZDL | COUNTERBORE LENGTH | 0.0750 INCHES NOMINAL |
| MATT | MATERIAL | STEEL MIL-S-7420 COMP E52100 |
| STYL | STYLE DESIGNATOR | SEAT |
| Relevant Components for NSN - 5340-00-021-5583, 5340000215583 | ||||
| 5320-01-311-2514 (5320013112514) | 5365-01-606-7886 (5365016067886) | 5310-01-687-5946 (5310016875946) | 5331-01-345-2325 (5331013452325) | |
| 5331-01-137-6352 (5331011376352) | 5340-01-677-5187 (5340016775187) | 5310-01-215-1121 (5310012151121) | 5330-01-558-9303 (5330015589303) | |
| 5320-01-007-1870 (5320010071870) | 5365-00-542-0989 (5365005420989) | 5305-01-279-0723 (5305012790723) | 5315-01-181-8363 (5315011818363) | |
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