Norton girder fork bottom spindle. The lower front spindle is a NOS military original that has been replated. This does not have the large friction knob. This spindle will fit Norton girder forks manufactured between 1932 and 1946 with splayed fork legs as fitted to the following models: Big 4, 16H, 18, 19, 20, ES2, CS1, CJ, 50 and 55. Part numbers from the 1946 parts book and overall lengths are as shown below so please check they will fit your bike before purchasing.Original parts numbers9266; A2/185 - Front Fork Bottom Spindle, Front [has hexagon and thread for damper knob]. 10 inch overall length.