Model: 643-842
O-ringProperties:
A nonmetallic circular item with an aperature, having a solid round cross-section. They are used primarily for sealing. For items with other than round cross section, see packing,preformed. For noncircular items with a round cross-section, see seal,nonmetallic round section and rubber,round section.
Part 643-842 NSN 5331-01-047-0435
Material Classification
Hazardous material, precious metals, criticality, enviroment, and electrostatic discharge indicatorsPackaging & Shipping
Freight Classification
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Schedule B and Export
- Schedule B: 4016930000
- SITC: 62999
- End Use: Industrial rubber products
- NAICS: 339991
- USDA: 1
Freight Class: Gaskets, washers and other seals, of vulcanized rubber other than hard rubber
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