×
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!

*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

Rivet functionality

Rivet functionality

Rivet functionality

(OP)
Hi,

I have a requirement to supply a monolock rivet for aircraft panel repairing. Please see the attached image.

1) I am trying to understand what is the advantage of monolock rivet over other rivets ?.
2) markings- there are two markings on top of this. i couldnt find any details about this in the rivet standards sheets.
3) Different colors- I believe the head is anodized for corrosion resistance. I am not able to understand the coatings of the stem & its advantage.

Anyone please help me to understand more.

RE: Rivet functionality

have you tried the rivet manufacturer ? (Auveco)

another day in paradise, or is paradise one day closer ?

RE: Rivet functionality

(OP)
I had a look into their catalogues, it says about visibility advantage thru the mandrel head. I have referred some other pictures also but the breakage is not clear, whethe the mandrel breakage provides any hole for inspection. Thats why I am looking for more info. Or it may be for providing a non sealing joint.

Auveco doesn't have the exact size as per my requirements.

RE: Rivet functionality

no, I think the mandrel is retained in the rivet after installation (or "breakage", if I understand right).

If they don't have the right size, why are you proposing them ??
Maybe try another manufacturer, Cherry (aka Peerless aka LISI) ?

another day in paradise, or is paradise one day closer ?

RE: Rivet functionality

(OP)
Thanks for the reply. I wanto understand , what is the advantage of this head over other type of mandrel heads.

RE: Rivet functionality

I assume the OEM used these in the first place ... and you're just replacing them. If so, match the OEM's finish.

From the pix online, it looks like the stem shouldn't leak. you can always add a drop of locktite to hold the stem.

another day in paradise, or is paradise one day closer ?

RE: Rivet functionality

V_VV.... WHAT part number???

'Au-ve-co' is a fastener/blind rivet manufacturer I am completely unfamiliar with... until I googled-them. I took a peek at an Au-ve-co BR catalog and did not recognize any rivets similar to the one You show in rather blurry/unfocused images... now I tend to believe the company makes industrial... not aerospace... BRs.

Also, the term 'Monolock' as-related-to blind rivets is unfamiliar to me... until I Googled it. I found images for 'monolock blind rivets': all of the images appeared to be industrial... not aerospace... BRs.

Is this for a homebuilt aircraft?? NO certified aircraft OEM [I'm aware-of] would allow these on their aircraft if they do not conform to existing BR specs.

NOTE.
The rivet images appear to be similar-to NAS1398Bs or Ds... all-aluminum... wire-draw cherry locks.

BTW... the [bleary/unfocused] manufacturer 'Au-ve-co'... and fastener-head code-symbol... do NOT appear in MIL-HDBK-57H [2017]... although the symbol 'vaguely-sorta' looks like an inverted 'T' ~= Townsend [Cherry rivet]… although it might just be a '.L '

Regards, Wil Taylor
o Trust - But Verify!
o We believe to be true what we prefer to be true. [Unknown]
o For those who believe, no proof is required; for those who cannot believe, no proof is possible. [variation,Stuart Chase]
o Unfortunately, in science what You 'believe' is irrelevant. ["Orion", Homebuiltairplanes.com forum]

RE: Rivet functionality

(OP)
Hi all thanks for the support.

this is an aerospace certified rivet. Made by Cherryaerospace. The rivet has a symbol 'T' on top of the head (inverted anchor shape). That is specific to the customer. The marking '2' represents the grip range for the riveting tool.

This type of stem head will be trapped inside the rivet head. That results more strength/vibration resistance/sealing.

The colors are related to the anodization. Head is clear and stem is yellow anodized.

My company is into design / manufacturing of aerospace mechanisms and procurement of parts for aircraft maintenance. This components is for maintenance activities. I have ordered these samples from UK. Waiting for the delivery.

RE: Rivet functionality

(OP)
Thanks IRSTUFF, WK TAYLOR & RB1957

RE: Rivet functionality

are you using "monolock" as a generic term ? to describe a blind rivet ?

when I google it all I get a pictures of blind rivets and links to "Monobolt" rivets by Auveco ... and these don't seem to be aerospace quality.
and I don't think Auveco is part of Cherry, although Cherry do, of course, make blind rivets.

another day in paradise, or is paradise one day closer ?

RE: Rivet functionality

V_VV..

Lets get this straight: You need the type-rivet shown... which I suspect is re-sold by 'Au-ve-co'... in a diameter or grip length not available thru that company... correct?

IF SO please tell us what diameter and grip length You actually need... for this style rivet? These rivets are available in nominal English diameters up-to 0.250-in Dia

Cherry [and their vendors] supply these rivets under Cherry-Rivet part numbers... and under the NAS1398 and NAS1399 specifications... interchangeably. https://www.cherryaerospace.com/docs/catalogs/CA-1...

NOTE.
These same rivets were redesigned with a different installation system... more-in-common to cherry-max... and those parts were designated CherryMax AB...
https://www.cherryaerospace.com/docs/catalogs/CA-1...
NOTE. There are 0.016-inch oversized [1OS] versions of these styles [primarily for repair]… but not above 3/16-Dia+1OS

Here is an 'old' Cherry Fasteners master-cross-listing... https://files.engineering.com/getfile.aspx?folder=...

Regards, Wil Taylor
o Trust - But Verify!
o We believe to be true what we prefer to be true. [Unknown]
o For those who believe, no proof is required; for those who cannot believe, no proof is possible. [variation,Stuart Chase]
o Unfortunately, in science what You 'believe' is irrelevant. ["Orion", Homebuiltairplanes.com forum]

RE: Rivet functionality

(OP)
@RB 1957, Monolock is specific to this type of stem head. Cherry has NAS-qualified rivets of this kind. Please refer to the attached.

@WK TAYLOR, Thanks for the shared excel.

I have selected the rivet number as per the spec sheet in the attachment (my attachment). Please share if you have any aerospace part supplier contact. I have many items are in pipeline to procure.

TAYLOR, Thanks for the info about oversized rivets for repairing purposes.

RE: Rivet functionality

please clarify your term "monolock", which is not on the Cherry spec sheet.

another day in paradise, or is paradise one day closer ?

RE: Rivet functionality

(OP)
Sorry, it's monobolt.

RE: Rivet functionality

ok, but the only thing that the internet links to "monobolt" is that Auveco thing (and other non-aerospace, Avdel);
which is why we were suspicious of it.

of course "MBC" on the Cherry spec could be MonoBoltCherry ?

another day in paradise, or is paradise one day closer ?

RE: Rivet functionality

(OP)
Just had a look for MBC info. Nothing found.Have to dig into reg trademark.😎..

Happy weekend...

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

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
The Great Project Profitability Debate
A/E firms have a great opportunity to lead the world into the future, but the industry’s greatest asset—real-time data—is sitting wasted in clunky, archaic ERP platforms. Learn how real-time, fully interactive dashboards in a modern ERP allow you to unlock data that will shape the future of the world. 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