| 摘要 |
In a fuel injection nozzle for an internal combustion engine, a frictional force reducing member is interposed between a seating surface of a shoulder portion of a nozzle body and an inner seating surface of a bearing portion of a retaining nut, whereby a frictional force developed between both seating surfaces and can be diminished without performing a high-degree of surface machining on the inner seating surface of a bearing portion of the retaining nut, even if the surface roughness of the inner seating surface of a bearing portion of the retaining nut is large. Consequently, it is possible to prevent deformation of a slide portion of the nozzle needle which is attributable to a twist of the nozzle body caused by frictional force.
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