连接金具是用于绝缘子连接成串及金具与金具的连接，它承受机械载荷。将绝缘子、悬垂线夹、耐张线夹及防护金具等连接组合成悬垂或耐张串(组)的金具称为连接金具，连接金具是架空输电线路金具中最为庞杂的一种电力金具。连接金具用来将悬式绝缘子组装成串，悬挂在杆塔横担上。
按照安装的不同，分专用连接金具和通用连接金具两大类，专用连接金具指绝缘子相连的球头挂环和碗头挂板。通用连接金具使用各种情况，其型号规格按荷重吨位分级。连接金具的一些常用产品有：直角挂板、延长环、球头挂环、U型挂环、碗头挂板、联板、平行挂板、DB型调整板。
专用连接金具的“球-窝”连接是根据绝缘子的结构特点设计，用于绝缘子之间、或绝缘子与其他金具之间直接连接。
用“球-窝”连接绝缘子后，再用球头挂环，碗头挂板将绝缘子、悬垂线夹、耐张线夹及防护金具等连接组合成悬垂或耐张串(组)
球头挂环
碗头挂板
球窝
直角挂板
延长环
U型挂环
联板
平行挂板
DB型调整板
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