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goldgunner goldgunner is offline
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Join Date: Apr 2005
Location: Foat Wuth
Posts: 408
Yes, good project.
SPS Unbrako offerings for non-standard flexloc nuts will be much to 'exhalted' in terms of required production minimum quantities and unit costs. There are other producers who will be much more approachable - so, do share any info you get from SPS and we'll work some others with that detail.

Also, the Flexloc configuration is specifically called a 'segmented beam' type locknut - this means that the top portion of the nut has very small slots (usually 6 to 8) that are then forced/crimped inward creating an area of reduced thread diameter that when installed provides a metal to metal prevailing torque locking mechanism. This configuration is preferred over other all metal type lock nuts because the locking force is spread 360 degrees around the mating male part - as opposed to other configurations typically called 'stover' or 'top lock' that may have 1 to 3 thread distortion-locking 'elements'.

Back to my original question: what are temperatures at the exhaust mating flanges? This info is really necessary to specify the fastener material, material condition and coating-if any.

As long as we're considering special production fastener items, I'm wanting to consider the option of very high temperature 'plastic' collar locknuts...not 'nylon' collars. I don't think Kel-F (PCTFE) - rated to 400 degrees F is anywhere high temp enough, but there are other potential materials. I can also have these type items run in reasonably small quantities at not to dear costs.
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Old 08-10-2005, 06:42 AM
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