Threading oar locks - Mountain Buzz

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Old 05-15-2016   #1
Denver, Colorado
Join Date: May 2006
Posts: 342
Threading oar locks

I have a set of cobra standard oar locks and have heard that threaded is better for energy transfer, noise, etc. to not have the oar lock slipping up and down in the tower.
Has anyone ever threaded a set they have? I think I can find a tap and die set to fit the nuts they use, but wondering if there's any reason not to.
I'd love to save $120 and tax and either buy a die set or borrow someone's once I figure out the thread pitch.
Any thoughts or ideas?
Thanks in advance,

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Old 05-16-2016   #2
Join Date: Jun 2004
Posts: 322
threads are 5/8-18. you need a die, no tap.
assuming the shank of the oarlock is pretty close to .625 you can run the die down and thread them. if diameter is larger i would not bother, if significantly under the threads will be too shallow.

personally, i have never had a problem with oar locks moving up and down in the towers, unless the oar gets hung up, or i am pushing off the bottom.
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Old 05-16-2016   #3
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Flagstaff, Arizona
Paddling Since: 1990
Join Date: Apr 2009
Posts: 552
Be careful to keep the die flat so threads are straight. Brass is soft so you must be extra careful. 5/8 - 18 TPI is correct. I have threaded many Cobras so I know that it helps to do a bit of reshaping near the split ring hole to help the die get started. Good luck!
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Old 05-16-2016   #4
Missoula, Montana
Paddling Since: 1992
Join Date: Mar 2015
Posts: 515
I made acrylic spacers for my Atomics because I wanted a little extra height and didn't like the up/down movement. 4 seasons and no complaints, just need to shoot some water in there once and a while to flush out the grit or they can start squeaking a bit. I don't see why it wouldn't work for Cobras, if you can't thread them on the cheap.
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