Captive nut question

[Jmac]

Funny as well as being a tech i was a structural tech with Boeing for 5 yrs. Spent 3 yrs with the FA18 here in Williamtown Newcastle, never used or heard of Keyserts. Anyone got a pic of an example or a source where i can get on from?? I agree with the load bearing issue thats why im being a bit hesitant. I was going to helicoil it today but held back till im truley satisfied in my head and qiute frankly im not at the moment. Been there before with Loons idea. Had a MK2 stripped and we opened up the rail and welde in a new nut. Total pain in the Ahole. How is the Keysert installed? i take it would be interference fit and yes there is loads of meat on the rail too. My old Foreman at Boeing is my best mate so ill be giving him a ring only thing is Boeing is all imperial man
Cheers
Guys
Jmac

[Preen59]

http://mdmetric.com/pdf/keysert.pdf

[Preen59]

How is the Keysert installed?
Jmac

You drill the hole to tapping size and tap it (obviously)...

Then you wind the keysert in by hand till it's flush with the top.

And finally, using a small hammer (and a pin punch if you want..), you tap the keys down into the parent metal.

The keys lock it in place without putting load on anything. And they're super strong.

[Jmac]

Ah yeah sounds good ill look into that mate. Loads of parent metal to play with. At the end of the day if all else fails i will use a tried and tested method i used on aircraft structures - Oversize bush couple of thou oversize then use liquid nitrogen to freeze and insert bush. So really having that there is tons of parent metal i could fit a say 22mm freeze plug giving you a fresh chassis rail so to speak then you can take it back to 17 0r 19mm worst comes to worst hey. Ill be looking at the keyserts 1st
Cheers again
Jmac

[Preen59]

Ah yeah sounds good ill look into that mate. Loads of parent metal to play with. At the end of the day if all else fails i will use a tried and tested method i used on aircraft structures - Oversize bush couple of thou oversize then use liquid nitrogen to freeze and insert bush. So really having that there is tons of parent metal i could fit a say 22mm freeze plug giving you a fresh chassis rail so to speak then you can take it back to 17 0r 19mm worst comes to worst hey. Ill be looking at the keyserts 1st
Cheers again
Jmac

All sounds pretty good to me.

Glad to help. I'm sure i'll have a question one day that you'll be able to answer..