This T47 bottom bracket shell is machined from 2" 6061 aluminum bar. The outside diameter is 1.937", textured to provide a mechanical interface with the bonding epoxy used in carbon fibor frame production. The width is 68 mm. The threads are M47 x 1, right and left hand, with a thread length of 0.50". The left hand thread is identified by a radial groove on the outside diameter of the shell. The minor diameter of the thread is 46 mm +.1/-0 and is relieved on the inside diameter to 47.75 mm +/- 0.1.
Item sold individually.