JLCPCB posted a question to its followers on X: what is the tolerance of a 0Ω resistor? The company’s own parts library lists one as “0Ω ±1%”. One percent of zero is zero, so the spec says nothing useful. JLCPCB asked for wrong answers only.

The replies ran where you would expect. One person offered to buy a batch, keep the ones with negative resistance, and get rich. Another asked what range 100 percent tolerance would cover.

One commenter said it is not always a joke. A purchasing agent at his wife’s company, where she does PCB layout, seriously asked what tolerance of zero ohm part to order for production.

Real zero ohm resistors are jumpers, and manufacturers do spec them, just with a maximum resistance in milliohms and a current rating rather than a percentage. The tolerance field is a leftover from the database that holds every other resistor.

See more at x.com.