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Product Description
This is a 1/20th scale Schnellboot propeller lock nut, It has an 8mm hub with a M4 threaded (4mm) hole. The Schnellboot has three propellers, the centre propeller is held in place by the center strut but the two wing propellers need a locknut, this is a tapered and pointed "locknut" to suit and make the wing props look like the original. Shapeways cannot make this in a cast metal, sorry!