Alligator caps do not have threads on the male end. The do have ridges ...nothing can screw on, but the lock-on chucks can grip them to lock on.
I got a pair of 4" solid extensions from a truck tire place for $6 ea, made in USA and were junk. Got a pair from RV dealer for $10 ea that work great.
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Paul (KE5LXU) ...was fulltimin', now parttimin'
2022 Coachmen Leprechaun 319MB
towing 2017 Jeep Grand Cherokee Limited
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