Flange stud

The utility model discloses a flange stud, which comprises a body, the tip fixed mounting of body has A tip and B tip, the A tip is the same with the quantity of B tip, is no less than threely, and A tip and B tip interval distribution form and place the chamber, and places to peg graft in the chamber and have the core. The utility model discloses behind normal use, can utilize midday to go into core top between A tip and the B tip, with its inflation, lock dead operation, this kind of lock is died will frictional force lock in the past extremely to change into and is blockked that the formula lock dies, effectual preventing because of the not hard up obscission that vibrations produced only needs the elder generation extract the core during dismantlement, utilize great power revolve screwed nut can, can also play the effect that A tip and B tip reset. 本实用新型公开了法兰双头螺栓，包括本体，所述本体的端部固定安装有A端部和B端部，所述A端部和B端部的数量相同，不少于三个，且A端部和B端部间隔分布形成放置腔，且放置腔中插接有芯子。本实用新型在正常使用后，可以利用中午将芯子顶入A端部和B端部之间，将其膨胀，进行锁死操作，这种锁死将以往的摩擦力锁死改为阻挡式锁死，有效的