Bolt for CAT 312, 315, 320, 322, 323, 324, 325, 330, 336, 345, 350, 365, 375, 385, 390 (8T-6430)

Description

The screw /8T-6430/ is part of the bolted joint. Screws are used in various types in mechanical engineering. For this reason, they come in many varieties, defined by the PN-91/M-82055 standard [1]. The screws differ, for example, in the shape of the head, the tip or the shape of a pin; length of the thread in relation to the length of the shank or the type of thread itself.

The phenomenon of bolts loosening after tightening or breaking them during tightening occurs in production processes, especially those where the bolt connects elements of various structures. These elements may differ, among others shape, chemical composition of materials, hardness and stiffness or coefficients of friction of friction surfaces. In bolted connections, it is very important to properly determine the tightening torque of the bolt /8T-6430/.

Screw tightening torque /8T-6430/

The table below shows the tightening torques for bolts and nuts with a coarse thread, expressed in Nm.

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