Fuel injector nozzle

A fuel injection for use in delivering fuel to a compression ignition engine, comprising an injection nozzle holder and a nozzle tip, the tip being provided with at least one outlet opening having a radially offset position with respect to a longitudinal axis of the tip, and a feature provided on the tip providing an indication of the position of said at least one outlet opening, wherein the tip includes a first region which is a radial interference fit in the nozzle holder to form a substantially fluid-tight seal between the nozzle holder and the first region of the tip, the tip further comprising a second, external screw-threaded region which is secured to an internal screw threaded region of the nozzle holder by a rotational screw-threaded engagement, a first shoulder on the tip separating said first and second regions and engageable with a second shoulder on the nozzle holder, and wherein the first region is arranged upstream with respect to the direction of fuel flow of the second region.