名词
中文翻译：紧固螺母
同义词：
['fastening nut', 'fastener nut']
例句：
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1.The bolts are securely mounted in the wall.
螺栓被牢固地安装在墙上。
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2. The engineer used a special mounting nut to hold the machine together.
工程师使用一种特殊的紧固螺母来固定机器。
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3. The carpenter tightened the mounting nut before driving the screw into the wood.
木匠在将螺丝钉插入木头之前，先拧紧了紧固螺母。