Model: 21B1021-2
Shouldered WasherProperties:
A washer, round in shape, and having a centrally located hole. One bearing surface is flat and unbroken, the other surface is in the form of a raised shoulder (boss) having a flat bearing surface. The thickness of the shoulder (boss) must not exceed 25 percent of the shoulder (boss) diameter. For items having a shoulder (boss) of greater thickness, use bearing, sleeve; bushing sleeve; or spacer, sleeve. Excludes insulator, washer and thrust type washers.
Part 21B1021-2 NSN 5310-00-978-7770
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: 3926904500
- SITC: 89399
- End Use: Other industrial supplies
- NAICS: 339991
- USDA: 1
Freight Class: Gaskets,washers & other seals
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