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Dumb threading question


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I feel like an idiot asking this ... but its a $200K piece of titanium and I DO NOT want to screw it up

 

1.5-12 UNJF ID thread .....

I can use a 12UN insert to thread it .... right ...

 

the root radius callout only applies to OD threads ... right ????

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I feel like an idiot asking this ... but its a $200K piece of titanium and I DO NOT want to screw it up

 

1.5-12 UNJF ID thread .....

I can use a 12UN insert to thread it .... right ...

 

the root radius callout only applies to OD threads ... right ????

 

you are correct the only diff. on a unj id thread is the minor dia. is bigger to

fit the root on the od thread. if you are using a full profile id insert you

will have to bore the id to the correct dia.

there is no diff. on the id thrd gages other then the lable that says un or unj

 

HTH Ken,

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Thanks guys...I've got the big stuff all worked out,

 

I'm hate to blow these 2 parts out on something as dumb as using the wrong threading insert..

 

I asked the same question of inspection and they just confirmed the deatails posted above

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  • 1 month later...

We make a nasty little aluminum trinket that's about 2"x2"x1" for the same Orion project. It's a housing for a switch for some hydrazine something or other. The stack of paperwork was at least 3X heavier than the parts. Our only non-conformance was that our certificate of conformance didn't state that the parts were lead-free. :lol::wallbash:

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