Welcome Back

Sign in to your PART66Online account

One click — no password needed

or use email
Forgot password?

Don't have an account? Register here

Capped nuts are used so

  • to prevent leaks from pipe ends.
  • the part is not over torqued as the bolt touches the captive part first.
  • to ensure that it is dry bolted.

Explanation from PART66Online

A capped (blanking) nut has a closed end so it seals the end of a pipe or fitting, preventing fluid or pressure leaking out. It is a sealing component, not a torque-limiting or dry-assembly feature.

A

Azfar asked · 6 Feb 2014

for this question the answer is part not over torqued as bolt touches the captive part first..

meanwhile for this question, the answer is to stop leak:
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.

care to explain anyone?

Community Comments (3)

P
PART66Online 7 Feb 2014
Hey.

There is some mess with this question... I will try to deal with this.
BTW, wikipedia says what cap nuts are used to prevent contact with the external thread.
P
PART66Online 7 Feb 2014
If someone can clarify, please do that. :)
J
Jordi 16 May 2020
so what is the correct answer?I have also seen that the answer is to stop leaking.

Please Sign In to post a comment.

We use essential cookies to keep you signed in, plus anonymous analytics to understand how the site is used. Cookie-based analytics is set only with your consent. See our Privacy & Cookie Policy.