Build Secrets
Just as important as using the correct fastener is ensuring that it is the correct length. The critical area is the loaded part of the bolt. This is the part that is in contact with the chassis or component. Never, ever have the threads loaded, as the sharp edges will act as a low-speed mill to wallow out your part, and they also form "stress risers" that can lead to fastener failure down the road. Military and aircraft bolts are available in a variety of grips (the part of the bolt without threads--the strongest part). The threaded part does not need to be any longer than the depth of the washers and nuts. A long length of thread that goes past the nut looks unprofessional, takes longer to install, adds extra weight, and is more easily damaged.
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