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Helicoil callout

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Nellysdad

Nellysdad

Aerospace
Joined
Oct 9, 2003
Messages
35
Location
US
I have a drawing here with helicoil callout NAS1130-4F-15/C
I make this to be a 1/4-28UNF x 1.5Dia tangless free running but I do not know what the /C denotes! I have scoured the Emhart website to no avail Any ideas? .....Seasons Greetings all...
 
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In think the C means cadmium plated.

I think the F after the 15 may mean free running, though in NAS1130 there should be no letter for free running but you put an L after the thread size code for locking types.
 
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Seems that "c" turned out to be "cleaned".
Thanx for all your help though.
FYI :-Emhart have a neat little piece of software that you can download to your desktop..Helicoil Bible!
 
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