Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here


need clarity on bolting

need clarity on bolting

need clarity on bolting

I need clarity on bolting. i need to bolt two plates which have holes of 20mm each. what is the bolt size i have to choose? should i consider any other parameters like tolerances,fits or screw threads? please do not delete this post considering the level of technicality involved. my doubt is only on choosing the correct bolt size for the given hole dia.please clarify.Thanks in advance.

RE: need clarity on bolting

I need clarity on what you are bolting and what the requirements are for the two parts you are bolting.

Without information, the only thing we can tell you is that your bolts need to be less than 20 mm diameter to fit through the holes.

They probably should be longer than the two material thicknesses added together, plus a margin for the washers or spacers if you need them, plus a margin (about 1/2 of the bolt diameter or so) for a margin to thread on the nuts, plus the thickness of the nut.

RE: need clarity on bolting

Hi racookpe,

This will do.thank you so much for your prompt reply.

RE: need clarity on bolting

I would choose a size that fits a 20mm hole.


Proud Member of the Reality-Based Community..

To the Toolmaker, your nice little cartoon drawing of your glass looks cool, but your solid model sucks. Do you want me to fix it, or are you going to take all week to get it back to me so I can get some work done?

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members! Already a Member? Login


White Paper - A Guide to 3D Printing Materials
When it comes to using an FDM 3D printer effectively and efficiently, choosing the right material at the right time is essential. This 3D Printing Materials Guide will help give you and your team a basic understanding of some FDM 3D printing polymers and composites, their strengths and weaknesses, and when to use them. Download Now

Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close