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Unit 1 of 17 · Free

One Screw

Follow a 3.5 mm bone screw from the thigh bone it holds to the machine that cut it. Then solve the recall.

8 hands-on lessons, then a case · about 30–45 minutes

A human figure with its skeleton visible and the thigh bone glowing gold

What you’ll learn

  1. 01Where it goes
  2. 02How a break is held
  3. 03Parts of a screw
  4. 04What it’s made of
  5. 05How a screw is made
  6. 06Why smooth matters
  7. 07Checking a batch
  8. 08When things go wrong