×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Contact US

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!

*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

Standards Regarding Counterbore Clearance Holes for Various Screw Types

Standards Regarding Counterbore Clearance Holes for Various Screw Types

Standards Regarding Counterbore Clearance Holes for Various Screw Types

(OP)
Hello everyone, hoping someone could point me in the right direction. I am currently aggregating all possible information regarding clearance hole sizing for a fixed fastener calculator. See image below.



All of the values in the tables are based off ASME B18.2.8-1999 which can also be found in the Machinery's Handbook. See images below.



This is what my calculator looks like, but I am missing information regarding minimum counterbore diameter for pan heads, button heads. I can get the MAX head diameter of the different screw types either from NAS or Machinery's Handbook. I could also calculate what the minimum CB diameter could be for a specified position tolerance, but that seems kind of arbitrary. Also I use Soliwroks as a CAD program but the clearance hole values seem to not correlate to any standard.

My question is, is there a standard out there that talks about counterbore depth and width for different fastener types?

Also for anyone who is curious, this is what the calculator looks like.

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


Resources

Low-Volume Rapid Injection Molding With 3D Printed Molds
Learn methods and guidelines for using stereolithography (SLA) 3D printed molds in the injection molding process to lower costs and lead time. Discover how this hybrid manufacturing process enables on-demand mold fabrication to quickly produce small batches of thermoplastic parts. Download Now
Design for Additive Manufacturing (DfAM)
Examine how the principles of DfAM upend many of the long-standing rules around manufacturability - allowing engineers and designers to place a part’s function at the center of their design considerations. Download Now
Taking Control of Engineering Documents
This ebook covers tips for creating and managing workflows, security best practices and protection of intellectual property, Cloud vs. on-premise software solutions, CAD file management, compliance, and more. 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