The > mil whips carry a coarse thread and require an adaptor for ham antenna > mounts which use a fine thread for what its worth. Not hard to make if > you have the right taps. > Ralph,VE3BBM Not sure of thread size needed but have a small (6ea) supply of adapters, 3/8 SAE male thread to 1/4 NC female, both a stud style and a coller adapter. Rod KØEQH