Locking twist clevis

[FBerkel]

I know this has been covered before, but I couldn't come up with it in a search, so: is the locking twist clevis considered safe for fall protection? I think it would not technically be allowable, and yet it seems pretty safe, as long as the pin is set with pliers.

 

[Tom Dunlap]

My preference is to use the No Snag shackles from:

http://www.bosunsupplies.com/


It does require using an allen wrench but I have kept one in the saddle pouch I have so that isn't a big deal.

A small drop of one of the lighter Lock Tite products isn't a bad idea either.

Tom

 

[Kneejerk Bombas]

Fred, the way ANSI is worded, it only refers to carabiners and rope snaps as needing to be double locking, no reference to clevises or screw links, so as long as they are within the 5400 lb breaking strength, anything goes.

I have seen copper wire used threw the hole in the pin and then wrapped several times around the shaft of the clevis, after tightening it with a tool of some kind. Just hand tightening it is no good.

 

[John Paul Sanborn]

I guess JPS got a little overzealous

Sorry Charlie, Ox started it there. I checked the history log.

No Snag shackles from

Do you use the 3/4 inch one? I like the stainless idea, but $58 bucks?
Might as well go with the 1/2 inch Titanium D for 45 bucks

 

[FBerkel]

Thanks, all.

JP: The smaller one in Sherrill. I'm experimenting with it as the slider on my butterfly, tried it with a bear paw to separate the two attachment points. So, the twist helps put everything where I want it. The bear paw weighs way too much, however; makes up for a lot of the weight I'm saving with the saddle in the first place.

 

[Tom Dunlap]

Check out the SWLs for stainless. I use 5/16" stock from Bosun. they have a 5:1 SF.

Tom

 

[NickfromWI]

Originally posted by FBerkel
. ...I'm experimenting with it as the slider on my butterfly, .....

Fred, If the screw pin is the part that's sliding back and forth on the saddle, keep a super close eye on it. It could conceivably unscrew itself! Oh, and tell David, Matt, and Kyle I said hi!!!!!

love
nick

 

[John Paul Sanborn]

Maybe put your own strap or line in there and thread a Petzl swivle in before tieing the cord off.

 

[TheTreeSpyder]

There was an interesting discussion about LockTite being very good, but it creates friction, so should be tightened more to get the same amount of pressure in thread tightness as part of the total pressure goes to friction in LockTite.

i liked the twisted clevis, put it on with pliers, then one day slipped a plastic wire tie throgh the eyeand back around device in opposite direction that it would screw open. Then tightened it, and left it in this position, where any movement open would automatically tighten the wire tie.

 

[FBerkel]

I replaced the stock strap with spectra webbing, water knot with tails stitched. I considered your point, Nick, but am pretty confident the pin needs much more force applied than the little bit from friction on the webbing.

I'll check into the Bosun gear after; RMC TCC is Sat., and this old man is trying once more.