SHTF electronic components kits?

Should I stock up on electronic components such as resistors, capacitors, diodes, wires, and tools such as soldering iron and wire strippers? I'm thinking they may be useful for fixing common electronic devices (blown USB charger?)

I have a basic knowledge of electronics and have soldered before.

Should these be kept in a EMP hardened box?

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SHTF electronic components kits?