Model: 521920
Plain Encased SealProperties:
A pliable rubber, felt, leather, or composition ring-shaped element, split or solid; with or without spring or spreader, having a metal shell on all or a portion of at least two of the outer surfaces. It may be designed to be either bolt mounted or pressmounted between fixed and moveable parts to form a tight and effective seal by the pressure of the spring or spreader or the resiliency inherent in the element material. Excludes packing with retainer.
Part 521920 NSN 5330-00-331-5451
Material Classification
Hazardous material, precious metals, criticality, enviroment, and electrostatic discharge indicatorsFreight Classification
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Schedule B and Export
- Schedule B: 8484200000
- SITC: 74920
- End Use: Industrial machines, other
- NAICS: 339991
- USDA: 1
Freight Class: Mechanical seals
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