Bristol Kit Car Club and Forum - BKCC

Kit Car Tech Talk And Build Stories => Bristol Kit Car Club Tech Talk - Click Here => Topic started by: Brandy Barrel on 04, January, 2016, 09:15:38 PM

Title: Captured nuts/threads in fibreglass
Post by: Brandy Barrel on 04, January, 2016, 09:15:38 PM
Does anyone know how to do this.
Are the special cage tupe nuts that i can bond into the fibreglass?
Or any other way?any thanks
Title: Re: Captured nuts/threads in fibreglass
Post by: benchmark51 on 04, January, 2016, 09:28:06 PM
I remember them from years ago, back in my lotus centre days. They were called bobbins and were 'glassed in' . I expect they're still available, but why not make your own?
Title: Re: Captured nuts/threads in fibreglass
Post by: Sumov8 on 04, January, 2016, 10:22:20 PM
I have tried Rivnuts on  my inner wings but this was only partly succesful as a number started to spin around despite being splined and a tight fit (example in link below), however if they were bonded as well they may work.  Regards

http://www.ebay.co.uk/sch/i.html?_from=R40&_trksid=p2055359.m570.l2632.R2.TR7.TRC2.A0.H1.Xriv+nut.TRS0&_nkw=rivnut+tool&_sacat=180124s 

Steve
Title: Re: Captured nuts/threads in fibreglass
Post by: Iancider on 04, January, 2016, 10:25:43 PM
The big name in this is "Big Heads" see the link below:

http://www.bighead.co.uk/english/products/adhesives.asp (http://www.bighead.co.uk/english/products/adhesives.asp)

Always go for stainless.  The fastener is normally bonded on to the surface then fibreglass is layered over the base.  Put masking tape on the thread to avoid gunking it.  Available in  Studs, nuts, sleeves hasps and the like.

Regards
Ian
Title: Re: Captured nuts/threads in fibreglass
Post by: benchmark51 on 04, January, 2016, 10:31:40 PM
This is the type of thing, but not difficult to make your own. Once glassed in, works a treat.

http://www.ebay.co.uk/sch/i.html?_odkw=fibreglass+bodywork+nuts&_osacat=0&_from=R40&_trksid=p2045573.m570.l1313.TR0.TRC0.H0.Xfibreglass+.TRS0&_nkw=fibreglass+Captive+Nuts&_sacat=0
Title: Re: Captured nuts/threads in fibreglass
Post by: Brandy Barrel on 05, January, 2016, 07:32:24 AM
Brilliant, thanks guys. Yes really wanted tried and tested solutions.
Totally agree with going stainless.
I knew if i asked you would know.
Title: Re: Captured nuts/threads in fibreglass
Post by: fletch_306 on 05, January, 2016, 11:11:38 AM
My cycle wings are fitted using big head studs which are bonded using a structural adhesive they have never come loose and there is no chance of a crack developing as there is no need to drill the wing. i love these things and when i finally come to strip the car fully and rebuild they will be the top of my list of parts!