Model: 3M221-4
Extended Washer Self-locking NutProperties:
A nut having 12 drive points, 24 sides, and an integral washer which extends beyond the points or periphery. An integral feature is incorporated for locking on the threads of a mating member.
Part 3M221-4 NSN 5310-00-680-5209
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: 7318160000
- SITC: 69421
- End Use: Finished metal shapes
- NAICS: 332722
- USDA: 1
Freight Class: Nuts of iron or steel
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