| 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) | 01-318-3404 (013183404) |
| NCB Code | USA (01) |
| Manufacturer | Navair And Navsea Managed, Zf Industrieantriebe Witten Gmbh, Inspektorat Wsparcia Sil Zbrojnych |
| MRC | Criteria | Characteristic |
|---|---|---|
| AAWY | COUNTERBORE DIAMETER | 0.6250 INCHES MINIMUM AND 0.6270 INCHES MAXIMUM |
| ABKW | OVERALL HEIGHT | 1.4370 INCHES NOMINAL |
| ABPR | FIRST STEP DIAMETER | 0.9930 INCHES MINIMUM AND 0.9950 INCHES MAXIMUM |
| ABXV | BORE DIAMETER | 0.4370 INCHES MINIMUM AND 0.4371 INCHES MAXIMUM |
| APGF | DESIGN TYPE | SOLID |
| BBRB | END DIAMETER | 0.6250 INCHES NOMINAL |
| BZDH | DISTANCE FROM END TO FIRST STEP | 0.3620 INCHES NOMINAL |
| FEAT | SPECIAL FEATURES | 0.2800 IN. W AND 0.6690 IN. DEEP AND EQUALLY SPACED FOUR SLOTS |
| MATT | MATERIAL | STEEL COMP 1020 |
| MDCL | MATERIAL DOCUMENT AND CLASSIFICATION | ASTM A108,GRADE 1020 ASSN STD SINGLE MATERIAL RESPONSE |
| SFTT | SURFACE TREATMENT | PHOSPHATE MANGANESE |
| STDC | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | DOD-P-16232,TY M,CL 2 DEF STAN/SPEC SINGLE TREATMENT RESPONSE |
| Relevant Components for NSN - 5340-01-318-3404, 5340013183404 | ||||
| 5320-01-093-5687 (5320010935687) | 5340-00-286-8500 (5340002868500) | 5310-00-797-4430 (5310007974430) | 5331-01-548-6940 (5331015486940) | |
| 5340-01-389-2408 (5340013892408) | 5340-01-499-3481 (5340014993481) | 5310-01-418-9739 (5310014189739) | 5320-01-419-8697 (5320014198697) | |
| 5340-01-681-6722 (5340016816722) | 5340-01-620-4639 (5340016204639) | 5340-01-481-2087 (5340014812087) | 5331-01-097-0869 (5331010970869) | |
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