Re: Super fastener holding ability needed

Posted by Bhunt on February 07, 2017 at 22:38:23 from (67.1.123.115):

In Reply to: Super fastener holding ability needed posted by showcrop on February 07, 2017 at 16:04:37:

Try MS21042L3 Nut The last number is the diameter in 16th of an inch 3=3/16 4= 4/16 or 1/4 5=5/16 6=6/16 or 3/8 7=7/16 so a 3/8 nut would be written like this MS21042L6

This is a fine thread nut used on Aircraft and not prone or likely to back off from vibration. They have a self locking feature there meant to be used once and only once. I agree that you should use a fine thread bolt grade 5 or better. If you use this nut and intend to torque the nut, check the running torque.The required torque to turn the nut on the bolt itself first. Then add that much more torque to the nut. I think the bushing is a fine Idea as long as the bushing is just slightly smaller than the material it goes thru length wise to allow for the clamping force needed to hold it in place.

Best of luck Byron

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