用于连接机械的固定链接功能,双头螺栓两头都有螺纹,中间的螺杆,有粗的也有细的,称呼:直杆/缩杆,也叫双头螺丝。一般用于矿山机械,桥梁,汽车,摩托车,锅炉钢结构,吊塔,大跨度钢结构和大型建筑等。螺栓特指直径较大一些的螺丝,也可以没有头部,如双头螺栓。一般的,不叫“双头螺栓”而叫“双头螺柱”。双头螺柱最常用的形式是两端有螺纹,中间是光杆。 最典型的用途:地脚螺栓、或者类似地脚螺栓的地方、较厚的连接,用普通螺栓无法实现的时候.doc-list{position:relative;background:#e9f3f6;margin:-11px 0 11px -10px;padding:0 5px 18px 10px}.doctor,.sick{border:1px solid #d2dadd;color:#333;margin:0 5px 0 -5px;background:#fbfdfd}.doctor{margin-bottom:16px}.doctor .title,.sick .title{height:38px;line-height:38px;border-bottom:1px solid #d2dadd;padding:0 10px;font-size:14px}.doctor .title span,.sick .title span{font-weight:bold}.doctor .area,.sick .area{height:32px;line-height:32px;padding-left:10px;border-bottom:1px solid #d2dadd}.doctor .area em,.sick .area em{color:#999}.doctor .area .current,.sick .area .current{color:#333;background:#ebeef0}.doctor .area .current,.doctor .area a,.sick .area .current,.sick .area a{padding:3px 4px;display:inner-block;margin:0 1px}.doctor table,.sick table{width:100%;border-spacing:0}.doctor a,.sick a{color:#136ec2}.doctor p,.sick p{height:32px;line-height:32px;padding:0 10px}.doctor p{border-top:1px solid #d2dadd}.sick table tr{border-bottom:1px solid #d2dadd}.doctor td,.sick td{text-align:left;padding:7px 0 7px 10px;line-height:18px;max-width:90px;word-break:break-all}.doctor p a,.sick p a{float:left}.doctor p em,.sick p em{float:right;color:#999} |