#190318 - Stem, 4mm dia. ($7.40)
#190320 - Stem, 8mm dia. ($5.50)
#190321 - Stem, 9.5mm Dia. ($7.40)
#190322 - Nut ($4.30)
#902804 - 8mm stem and nut combo ($10.20)
Prices referenced are from a year 2000 CD-Rom. Call Long Island Indicator to see if they have/can get the parts if you don't have a Mit repair facility near you. As far as I can tell these parts only came with specific indicators, mostly in the early 1990's. I found two different thread major diameters in our indicator junk box last night but the thread pitch was the same on both. -Mike