Tensile Nuts Procedure for Tightening Nuts and Bolts

Would it matter if tightened the bolt head or the nut? This is a question that many workers ask on the field. It does not matter if the bolt head and the nut face have the same diameter. If they are different, then it matters.

Tighten the nut

Let us say the nut remained flanged and the bolt head was not. In case the tightening torque we determine according to the nut and we tightened the bolt instead then the bolt could become overloaded. You must order good quality item from the High Tensile Nuts Manufacturers. You use only 50% of the torque to overcome the friction under the tightening surface. And if you use a smaller friction radius, this would result in more torque going into the thread of the bolt. This will result in the bolt being over tightened. The opposite case is also true. If we determine the torque according to the bolt head and you tightened the nut instead, the bolt would be under tightened. You can get more specifications from the High Tensile Nuts Suppliers.

Thread protrusion length

We give a least thread protrusion length to ensure that all the threads remain engaged. Check the specifications from the High Tensile Nuts Manufacturers To use it, check the drawing and see what the specification says. The component drawings will specify the type of it and its length, the size of the bolt, stud, bolt stud, and so on. If you follow this then you will get the proper protrusion. If you had no specification, then use commercial stock lengths. Threaded fasteners when installed and tightened should protrude at least one thread above the top. Excessive thread protrusion is harmful to machinery and men. So, try to keep the protrusion to less than 5 threads. But, there is no greatest value. The logic is that too much protrusion is a waste of material and it adds to the weight.

Use of a jam nut

One of the things that often puzzle the worker is whether to put the thin nut first or the thick nut into the socket first. This answer you can get from High Tensile Nuts Suppliers. Most of the people answer that the thick nut should go in first. The logic they explain is that the thick nut in the socket will help to prevent the thread stripping. But, you have to put the thin nut in first. The thick nut comes on top and this will jam the thin nut. This is the reason we call it the jam nut. You screw the thin nut inside only in part, about 30% of the way. Then, put the it on top of this. Make sure the thin nut does not turn when you tighten the thick nut. If you put the thin nut on top, it will not jam the nut. What happens is the threads of the thin nut remain stripped if it is a tight fit.

There are instances when dilation might occur. If this is the case, then you should tighten the bolt first. The dilation effect happens due to the wedge action of the threads.

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