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I prefer shackles only because I like to take them off when I know I won't be using them for an extended amount of time.
But WOW.. Lots of bad advice here. If you decide on a shackle you MUST use a "bolt" type shackle. Every other type of shackle show here on this thread is a "pin" type. Pin shackles will generally shear the threads of the pin with much lower amounts of side load compared to the bolt types. You also want a capture spring or cotter pin to protect against losing the bolt and having a POUND of metal vibrating off YOUR truck and killing somebody's kid because it's bouncing down the road at 70mph. A pin-type shackle can (and will) come loose and fall off. I went with 2 USA made CM 5/8" 4.5Ton (minimum 54,000lb breaking limit) shackles. This is what you want:
WOW, MUST use a "bolt" type. Talk about over kill. The pin type will shear at a lower side load than a bolt type but the pin type has more than enough capacity. Please provide specifics on the side load a 3/4" pin shackle will fail.
The hole in the head of the pin shackle I have allows for it to be safety wired to prevent it from turning but I have not found that necessary. The pin has never loosened. I've had times where I needed pliers to loosen the pin after it was hand tightened.
Depending on how they are mounted I think he is saying the pin type can flex and rip the threads out with excessive side loads.
For the trailers that I haul, I'm thinking the safety chain itself or the steel of the receiver hitch loop will let loose long before a 3/4 shackle will.
But I'm hoping to never find out.
For the trailers that I haul, I'm thinking the safety chain itself or the steel of the receiver hitch loop will let loose long before a 3/4 shackle will.
But I'm hoping to never find out.
The cheesy chains will give out long before a clevis or hammer locks.
I am not concerned with my 5/8" screw pin D-ring shackle breaking, or un-screwing itself (as tight as I installed it), in my 10,000# pound trailer applications. The failure point would be in the safety chain hook at one of these points.
I am not concerned with my 5/8" screw pin D-ring shackle breaking, or un-screwing itself (as tight as I installed it), in my 10,000# pound trailer applications. The failure point would be in the safety chain hook at one of these points.
If you had that much pressure or torque being put on those points I dare say you have bigger problems happening to be worried about.
