We are offering prop sleeves. tube size 60. 3 mm dia thickness 3, 3. 5, 4 mm threading 4 tpi weight vary as per size lengthas per requirement packing 40 pcs finish self & zinc electroplated nut malleable casting & drop forged application: for light ang heavy duty props note: 1. available in lenghts as per requirement 2. all types of nuts , both casting and forging are available.