I've never had one like that...The spring loop is held (clamped) by the screw head and the locknut only serves to stop the screw coming loose...I don't recall how far the thread runs up the original screws. Interestingly, original screws are also hardened...Thread is 1/4" cycle thread....Ian

email (option): ian@wright52.plus.com

I stand corrected.:blush: Ron

email (option): ronpier@talk21.com

Thank you gentlemen, for your help. Dave.

email (option): cooch.212@hotmail.com