×
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

5/16-18 Button Head Socket w/Nylon Pellet

5/16-18 Button Head Socket w/Nylon Pellet

5/16-18 Button Head Socket w/Nylon Pellet

(OP)
I am trying to source a 5/16-18x1 button head socket screw that is self-locking.  We have tried the hardware with the applied patch of thread-locking compound, but we have twisted the heads off a few during disassembly.  I am wondering if anyone has a source for this size hardware that has a nylon pellet for the locking feature?  I know I have seen them on set screws, but do not know if they exist on this size hardware as a standard components.

"Art without engineering is dreaming; Engineering without art is calculating."

Have you read FAQ731-376: Eng-Tips.com Forum Policies to make the best use of Eng-Tips Forums?

RE: 5/16-18 Button Head Socket w/Nylon Pellet

www.mcmaster.com
McMaster-Carr part  92360A425
they have stainless also.

RE: 5/16-18 Button Head Socket w/Nylon Pellet

(OP)
Badservo, these are the ones that have the applied patch, I am looking for a inserted nylon pellet instead.  Thanks though.

"Art without engineering is dreaming; Engineering without art is calculating."

Have you read FAQ731-376: Eng-Tips.com Forum Policies to make the best use of Eng-Tips Forums?

RE: 5/16-18 Button Head Socket w/Nylon Pellet

Mango,

I would like to give you some unsolicited advice.  Thermoplastic polymer patches are practically worthless.  If you can't reliably retain preload in your joint, use thread adhesive.  There are many versions, from reuseable to never get it off.

Regards,

Cory

Please see FAQ731-376: Eng-Tips.com Forum Policies for tips on how to make the best use of Eng-Tips Fora.

RE: 5/16-18 Button Head Socket w/Nylon Pellet

(OP)
Corypad, I understand the advice you are giving me, and appreciate it.  The self-locking attribute is a customer driven requirement.

I have found a source, http://www.longlok.com

"Art without engineering is dreaming; Engineering without art is calculating."

Have you read FAQ731-376: Eng-Tips.com Forum Policies to make the best use of Eng-Tips Forums?

RE: 5/16-18 Button Head Socket w/Nylon Pellet

So you are considering the Tek-Lok product (pellet), not the Poly-Lok product (patch)?

Either way, I weep for you...

RE: 5/16-18 Button Head Socket w/Nylon Pellet

Take a look at

http://www.accuratescrew.com/Optional-Product-Features.aspx

I think I've got fasteners from them before, but not with the patch or insert.

I just did a search for MIL-F-18240 and they came up.

My last place used the patch type to MIL-F-18240 (not from this supplier) on setscrews on aircraft stores.

Tried combining MIL-F-18240 with button head and didn't get much.

http://www.google.com/search?hl=en&q=MIL-F-18240+button+head

This one may be worth looking at.

http://www.qualifiedfasteners.com/card.html

KENAT, probably the least qualified checker you'll ever meet...

RE: 5/16-18 Button Head Socket w/Nylon Pellet

You could try Nylok's "Blue Pellet".

www.nylok.com/products_bluepatch.htm

About ten years ago I did some work in Anaheim facility and picked up a handfull of stuff that should work...if they are still there.

Rod

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