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ecmn | on a threaded shackle you dont screw the pin in tight, back it off a 1/2 turn from tight, that way it comes loose.
use threaded shackles with tie wire on them or threaded pins with nuts and a safety clip in them. if both are rated for the load either is safe.
most shackles (clevis in farm terms) will have a rating on them. I know that if we got a loaded semi stuck next to the crane and i use a couple 20 ton shackles we can lift the trailer and swing it out of the mud and set it on the road safely. if i use a couple shackles that "look good enough" someone can die or we bought a company a new trailer. | |
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Be careful using a twist clevis.
