It has the Mitsubishi S4QS.
You have me thinking now. I have to make a parts order sometime and I think I'll order a new factory nipple to compare. I think I'll also look for a nipple with a little extra length but it's an M20 diameter x 1.5mm thread so that may not be an option.
With some of the boneheaded things I have found that the previous owner did I would not doubt it isn't the factory installed nipple.
It COULD happen that such a nipple would get stuck in the filter and be discarded with the filter.
Yeah, I know, I know, they are supposedly staked in, or at least thread locked (loctite'd) in, but could happen.
I would be very Leary of a strategy to use a longer nipple.
If it projects too far into the filter it could cause internal damage, resulting in total internal by-pass. If it merely stops the filter from getting on far enough to compress the gasket, at least you'll know about that fairly quickly (-:
Information nobody asked for (in this thread);
Not knowing which other engines have been used in Montana tractors, or who contract built them, the Kukje HRA1102000A3 filter supposedly cross references to an STP 52808.
This is used on the Kukje built, Cummins designed 4 cyl diesel.
They claim to actually BUILD that engine under patent license from Cummins and their tractors have been painted to order for several OEM brands, including JD.