Trailer hitch/loop thingy...what the hell is it? (2 Viewers)

[Mark W]

Oh yeah, You won't see significant stress when using it to tow a trailer. It's when used with snatch straps for recovery purposes that the limits might get pushed.


Mark...

 

[Mark W]

So Mark, what is the actual difference in strength (bending resistance) between the grade 6 and grade 8 bolts?

M

I'd have to look it up. To be honest I'd probably just google it 'cause I don't think the charts I have at the shop list grade 6 IIRC.

Keep in mind that if you are looking at bolting the pintle to the rear of the rig, the loading will be almost pure tension, not bending or shearing.


Mark...

 

[Mike S]

I'd have to look it up. To be honest I'd probably just google it 'cause I don't think the charts I have at the shop list grade 6 IIRC.

Keep in mind that if you are looking at bolting the pintle to the rear of the rig, the loading will be almost pure tension, not bending or shearing.


Mark...

No big deal. I have my pintle hitch on a reciever - so I can switch for pulling a boat trailer or other. When you jack knife the trailer, you can get some significant shearing forces going. Yep.

M

 

[brownbear]

http://www.boltdepot.com/fastener-information/Bolt-Grade-Chart.aspx

 

[Brian in Oregon]

I have an A frame towbar made for a military Heep. It's designed with a lunette at one end. It's one solid piece, with no spring loaded lunette like in the photo Snook shows above.

Instead, there is a tube welded on top just back from the lunette ring that holds a snugging assembly to take the play out of the lunette and pintle. Unfortunately my snugging assembly is missing, and I can't find a pic of one on the 'net, else I'd post it here. But someone who is enterprising with fabrication and understands the concept could take the ball and run with it from here.

 

[honk]

Mike S,

I don't think that I've ever seen a Grade 6 bolt. How are the heads marked?