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Module 6. Materials & hardware

Capped nuts are used

  • prevent overtightening due to the threaded portion being restricted by the cap.
  • to provide a dry torque joint.
  • to stop leaks.

Explanation

A capped (acorn/dome) nut has a closed top that seals the thread end, so it is used to stop fluid leaking past the exposed thread and to protect the protruding bolt end. It does not provide a dry-torque joint or assure dry bolting.

cpster asking:

need expanation

Community Comments (4)

R
Roman Raicu Posts: 2 02.04.2018 / 12:52
What kind of leaks??
J
Jordi Posts: 198 18.05.2020 / 09:42
leaks man ,leaks from hydraulics leaks from fuel etc.
M
m.dimitris Posts: 1 16.04.2021 / 19:49
i think it is wrong this question .! the first answer is correct
https://en.wikipedia.org/wiki/Acorn_nut
this link explain
M
mau__17 Posts: 1 18.01.2026 / 12:57
I dont get it, capped nuts aren't leak proof right?

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