Seat belt mounting bolts

[Jon 2]

The seat belt mounting bolts on my Mark IV are AN3 with a spacer to fit the larger hole in the mounting hardware for the  belt.  AN3 looks small for the job they need to do. The hole in the belt mounting hardware will take an AN5.  Have any of you up sized the bolts?  The plate that holds the mounting bolts looks heavy and could take the larger bolt.

 

Thanks,

 

Jon

[EDMO 1078]

My Kitfox uses 5/16 bolts - on the lower outside fitting, they need to be put in before the fabric goes on - there is a fiberglass disk that is epoxied to the head to protect the fabric - this could be made of some other material.

I would go with the largest bolt possible.

EDMO

[Av8r3400 1179]

Mine uses a larger bolt, with an aluminum disc glued to the fabric for protection.

 

I would use what ever the larges bolt that will fit through the seat belt bracket and the airframe mounting hole.

[EDMO 1078]

You could glue a piece of rubber or anything to keep the bolt head from wearing on the fabric - whatever works for you.

EDMO

Edited 19 Feb 2014 by Ed In Missouri

[akflyer 1427]

If you hit hard enough to shear the an3 bolt, your worries are over anyway. If you go to a bigger bolt all your doing is tricking yourself into feeling better

[EDMO 1078]

And small bolts wear faster and get weaker as time goes by - bigger is better - but not bragging!

And, why did this post end up on the wrong section?

EDMO

Edited 5 Mar 2014 by Ed In Missouri

[akflyer 1427]

It looks like it is in the right section to me Ed.