My 1943 Logan 820 came without a Saddle Lock bolt and nut. The bolt is 7/16-20 by 3 3/32" which I got that info from the manual but it does not give specs on the lock nut. The photo of it shows an almost triangle piece but with a partial railings on the corners. If you have one on your lathe -- would appreciate more specifics on it. I'm going to try to mill one ... thanks