Originally Posted by
JonB_in_Glencoe
I have never found any info on the markings cast into the 45.
The Oring style nut that Lyman uses on the 4500 will fit on the 45.
I actually prefer the old brass sleeve style nut, they act like an indicator of over pressure or over heat, as they will leak quite a bit in those conditions, but if you keep it at the correct pressure and temperature, they will not leak or maybe leak a tiny ribbon of lube. Also there is no Orings to replace, they get pinched easily when adding more lube.