A strut assembly for an external fixation system , comprising: an elongate first end member comprising a first end portion, a second end portion , and a first axial cavity extending from the second end portion ; an elongate intermediate member comprising a third end portion, a fourth end portion , a second axial cavity extending from the third end portion, and a threaded rod rotatably and axially fixedly coupled within the second axial cavity, the intermediate member being rotatably fixed and axially translatably within the first axial cavity of the first end member and extending therefrom through the second end portion ; an elongate second end member comprising a fifth end portion, a sixth end portion, and a third axial cavity extending from the fifth end portion, at least the fifth end portion of the second end member being received within the second axial cavity of the intermediate member and the third axial cavity being threadably coupled with the threaded rod of the intermediate member , the second end member extending from the second axial cavity through the fourth end portion ; a first adjustment mechanism at the second end portion of the first end member configured to selectively allow the intermediate member to freely axially translate within the first axial cavity and to selectively axially fix the intermediate member relative to the first end member ; and a second adjustment mechanism at the fourth end portion of the intermediate member configured to selectively rotate the second end member with respect to the intermediate member and the threaded rod to axially translate the second end member relative to the intermediate member . an elongate first end member comprising a first end portion, a second end portion , and a first axial cavity extending from the second end portion ; an elongate intermediate member comprising a third end portion, a fourth end portion , a second axial cavity extending from the third end portion, and a threaded rod rotatably and axially fixedly coupled within the second axial cavity, the intermediate member being rotatably fixed and axially translatably within the first axial cavity of the first end member and extending therefrom through the second end portion ; an elongate second end member comprising a fifth end portion, a sixth end portion, and a third axial cavity extending from the fifth end portion, at least the fifth end portion of the second end member being received within the second axial cavity of the intermediate member and the third axial cavity being threadably coupled with the threaded rod of the intermediate member , the second end member extending from the second axial cavity through the fourth end portion ; a first adjustment mechanism at the second end portion of the first end member configured to selectively allow the intermediate member to freely axially translate within the first axial cavity and to selectively axially fix the intermediate member relative to the first end member ; and a second adjustment mechanism at the fourth end portion of the intermediate member configured to selectively rotate the second end member with respect to the intermediate member and the threaded rod to axially translate the second end member relative to the intermediate member . <EOS>