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) | 00-021-5553 (000215553) |
| NCB Code | USA (00) |
| Manufacturer | Hydro Aire Inc |
| MRC | Criteria | Characteristic |
|---|---|---|
| ALME | MATERIAL HARDNESS RATING | 25.0 ROCKWELL C MINIMUM AND 35.0 ROCKWELL C MAXIMUM |
| APGF | DESIGN TYPE | SOLID |
| MATT | MATERIAL | STEEL |
| SFTT | SURFACE TREATMENT | PASSIVATE |
| ZZZV | FSC APPLICATION DATA | AIRCRAFT HYDRAULIC,VACUUM,DEICING SYSTEMS |
| Relevant Components for NSN - 5340-00-021-5553, 5340000215553 | ||||
| 5305-01-642-0405 (5305016420405) | 5340-01-469-1045 (5340014691045) | 5315-01-562-5736 (5315015625736) | 5315-01-575-7397 (5315015757397) | |
| 5310-00-347-0214 (5310003470214) | 5320-01-073-2961 (5320010732961) | 5342-01-117-9590 (5342011179590) | 5355-00-201-5369 (5355002015369) | |
| 5305-01-321-3806 (5305013213806) | 5330-00-256-6918 (5330002566918) | 5365-01-625-0045 (5365016250045) | 5310-01-593-4780 (5310015934780) | |
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