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Anybody use the 13.5cc KRC pumps
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<blockquote data-quote="patooyee" data-source="post: 320695" data-attributes="member: 483"><p>JIC's thread profile, the shape of the actual threads, is slightly different than AN. The pitches are the same and they will thread interchangeably, but the way the male thread mates with the female is weaker on JIC (don't quote me on this, its been a while since I read about it) by like 20%. Then when you combine AN with JIC it gets weaker to the tune of about 35%. There is a quasi-famous airline crash with deaths that they traced back to a broken JIC fitting that was used where AN was spec'ed.</p><p></p><p>Then to complicate matters worse, many JIC fitting manufacturers market their fittings as AN. So even if you are buying AN a lot of the time you are getting JIC.</p><p></p><p>I buy them and interchange the piss out of them, don't care about the thread profiles. But It was interesting reading for me back about 4 years ago when I found the engineering article about it.</p></blockquote><p></p>
[QUOTE="patooyee, post: 320695, member: 483"] JIC's thread profile, the shape of the actual threads, is slightly different than AN. The pitches are the same and they will thread interchangeably, but the way the male thread mates with the female is weaker on JIC (don't quote me on this, its been a while since I read about it) by like 20%. Then when you combine AN with JIC it gets weaker to the tune of about 35%. There is a quasi-famous airline crash with deaths that they traced back to a broken JIC fitting that was used where AN was spec'ed. Then to complicate matters worse, many JIC fitting manufacturers market their fittings as AN. So even if you are buying AN a lot of the time you are getting JIC. I buy them and interchange the piss out of them, don't care about the thread profiles. But It was interesting reading for me back about 4 years ago when I found the engineering article about it. [/QUOTE]
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