×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

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

Jobs

A286 screws and there appropriate torque value with nickel-teflon coa
2

A286 screws and there appropriate torque value with nickel-teflon coa

A286 screws and there appropriate torque value with nickel-teflon coa

(OP)
I am currently working a project which nessesitates A286 metric socket head cap screw being coated w/ Nitef coating and torqued to 35-45 in-lbs.

We are having a high failure rate before reaching 45 lbs.

Alternatives or solutions out there ?

RE: A286 screws and there appropriate torque value with nickel-teflon coa

2
What size bolt is it?  M4 or smaller and you've exceeded the recommended seating torque according to the guide I have, which lists UTS as 189 ksi for the alloy steel used in the guide.  According to my information, A286 has an UTS of 146 ksi, which means your torque should be even lower.

Andy

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!


Resources