Hex dome nuts DIN 1587

Also known as an acorn nut, hex dome nuts DIN1587 have a largely hollow dome to provide space for any thread exposed after tightening up.

亦称橡实坚果，DIN1587标准的六角穹顶螺母具备大部分为空心结构，以便为紧固后可能暴露的螺纹提供空间。