The lug boss is arranged between the screw head and the screw rod, and the external circumference of the lug boss is provided with a plurality of longitudinal grooves.
The lug boss can locate the lead sheath well. The lead sheath can prevent water, oil and so on from entering the interior of the electric motor from the wire outlet effectively.
The side of the lock-up set is provided with a semicircle lug boss, which is allocated with the semicircle groove arranged on the shell.
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