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Question:

Screw, nut, gasket connection order is how ah, elastic gasket and cushion under what circumstances should be placed on the

Stud that head or nut that ah, I need to have the authority of the provisions of the document, please know that the prawns are told, thanks to!

Answer:

In the "mechanical design manual" in detail. Usually the washer is placed on the side of the nut, and a flat gasket connection than no washer connection strength is larger; the elastic washer relaxing, flat washers and spring washers if used at the same time should be placed between the elastic washer flat washer and nut.
The main purpose of the elastic cushion is to prevent loosening, which is added at the end of the screw, and the screw nut is arranged on the side of the nut.
The effect of several kinds of flat pad, a height adjustment bolt or nut in the side is convenient; two is to increase the contact surface, flat pad at the ends of the more; three is the stable friction coefficient, flat pad on both sides, and tighten the pad is not allowed to transfer medium; four is to prevent injury to pull bolt, in order to prevent stress concentration, the bolt head and the bolt six transition angle bar has great chamfer hole chamfering small, tighten the bolts if the head injury, this washer the chamfered surface into the six hexagon head bolts can be avoided.
This is not a fixed pattern, the main design requirements. But there are rules to follow
Washer look at the situation there is a large screw hole to prevent the screw directly into the hole on the installation of the screw to prevent the nut back on the nut installed on the other side of the file?

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