Good knot to tie a cinch downed continuous loop (like double fishermans)?

[raisins]

Is there a knot that ties a strong loop but you can tie it tight? Imagine if you could tie one side of a loop created by double fisherman's, cinch it down, and then tie the other side without creating slack. You'd then have a tight little stand alone loop. A slip knot like a scaffold knot won't work for what I'm doing because it relies upon force from the long end and would come apart if left on its own a force tried to open it.

The loop cannot be sized appropriately and then slipped over the end because it must go through a channel.

I know I could tie a square knot, but I don't trust them not to come undone (climbers call them the death knot).

If I could tie a tight overhand bend then that would work, but not sure how to do that.

Thanks - R

 

[ThereWillBeSpuds]

Double fishermans bend is how people make prussic loops from rope.

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[raisins]

Double fishermans bend is how people make prussic loops from rope.

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Yep, it's a general purpose loop making knot. But you can't do something with it very easily like make a tight (can't slide your pinky behind it) loop around a piece of 2 by 4, for instance. You can make a tight loop like that with a slip knot, but then if you let go of one end then the loop opens, which I don't want.

Also, I can't pre-size the loop and then slide it over what I'm trying to do. So, in my example above, it is more like a 2 by 4 where each end is nailed to an upright.

 

[ThereWillBeSpuds]

Blakes hitch loop? Id illustrate but I am at work so I dont have any rope with me. Would maybe be able to slide it tight and then set it.

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[ThereWillBeSpuds]

Midshipmans hitch?

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[bj139]

Figure eight follow through.

 

[ThereWillBeSpuds]

Figure eight follow through.

Kinda fiddley to get tight but totally doable

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