An intramedullary nail includes a body sized and shaped for insertion into a medullary canal of a bone and extending along a longitudinal axis from a proximal end to a distal end and a channel extending through the body along the longitudinal axis in combination with a locking hole extending laterally through the body along a central axis and in communication with the channel, the locking hole defined by a first opening extending through a first portion of a wall of the nail and a second opening extending through a second portion of the wall substantially opposing the first portion, the first opening being elongated in a lateral direction relative to the longitudinal axis of the nail and the second opening including a coupling element configured to lock a portion of a bone fixation element therein.髓內釘包括:本體,其被形成尺寸和形狀為插入到骨的髓管中並且沿縱向軸線從近端延伸到遠端;以及溝道,其與鎖定孔結合沿縱向軸線延伸穿過本體;鎖定孔沿中心軸線側向延伸穿過所述本體並且與溝道相通;鎖定孔由延伸穿過釘的壁的第一部分的第一開口、以及延伸穿過所述壁的與第一部分大致相對的第二部分的第二開口來限定,所述第一開口在相對於釘的縱向軸線的側向方向上伸長,並且第二開口包括耦接元件,該耦接元件被構造為將骨固定元件的一部分鎖定在其中。(10)...骨(100)...髓內釘(102)...鎖定孔(104)...遠端部分(106)...遠端(110)...第一開口(114)...第二開口