Model: 398
Hexagon Castellated Plain Nut3b thread class, right-hand , castellated, hexagon nut style, 0.406 inches nut height, 0.563 inches width across flats, unf thread series.
Properties:
A nut having 6 flat sides, flat on the bottom and having a slotted cylindrical or dome shaped upper portion. It is designed to provide positive locking when used with a solid or split (cotter) pin. Excludes nut (1), plain, slotted, hexagon.
Part 398 NSN 5310-00-012-2531
Material Classification
Hazardous material, precious metals, criticality, enviroment, and electrostatic discharge indicatorsFreight Classification
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Schedule B and Export
- Schedule B: 7318160000
- SITC: 69421
- End Use: Finished metal shapes
- NAICS: 332722
- USDA: 1
Freight Class: Nuts of iron or steel
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