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Fastener Standards

A guide on fasteners and fastener standards common in FRC.

Bolts and Nuts

Modern FRC generally uses two different types of imperial bolts, #10-32 and 1/4-20. FRC COTS components primarily utilize 10-32 fasteners, and with a bit of effort, we can make robots that use almost exclusively 10-32 hardware. In general:

  • 10-32 is used for almost everything: retaining shafts, screwing into motors, superstructure, etc.
  • 1/4-20 is used for structural applications where more strength is required than #10 can provide.

When designing around hardware, it is best to use the hole tool

  • 10-32 hardware uses a hole diameter of 0.196 inches for a standard fit
  • 1/4-20 hardware uses a hole diameter of 0.257 inches for a standard fit

Tapped Components

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Bolt Retention

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Rivets

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Welding

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