Identification of universal jpints L=øBearing diameter O=Inside snapring N=Outside snapring The NLM No. of a universal joints may be found quickly from the table. Measure the bearing diameter (L) and the length between bearing taces (N)or the length between snapring grooves on bearings (O) of the worn part. The NLM-No.can be traced then by comparing the measured dimensions with those specified in the table.   Identification of universal joints P=Centering R=holes Space The NLM No. of universal joints may be found quickly from the table .Measure the bearing diameter (L) and the length between bearing faces (N) or the length between snapring grooves  on beaarings (O) og the worn part. The  No. can be traced then by comparing the measured dimensions with those specified in the table.