what grade bolts to use for tow loops, anybody with OEMs on?

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cruiserdan said:
WOW R2!


Ya lost me right after tensile...............:D


You mean a bolt is not a bolt?..................:eek:



I thought tensiles was what you had removed when you were a kid....:D




Oh, wait......You work on airplanes..........That explains your fastener fetish...:D

Hehe... no I work on buildings. Raven's the airplane man, I just fly-em.

Wasn't trying to show off there, or come off like I know everthing there is to know about fasteners, but I didn't want anybody to be mislead by the values listed in Wileetoyote's link. Proof load, yield strength, & minimum tensile are the basis for design strength, but as mentioned in the early thread, these are not the design loads. In design, you have to factor these "ultimate" (failure) loads down to obtain the appropriate working load. As you can see, there is a pretty substantial safty factor involved, and that is typically the approach when dealing with fasteners because when they fail..., thinks go boom. Not like a beam per-say, when if you over load it, you're going to get significant deflection, and typically will know that something's not right, but if the bolts on the end fail, you're going for a ride.

:beer:
Rookie2
 
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the roo bar that came with mine was held by 8.8 bolts. No OEM left then if these are supposed to be marked with the bars.
Interestingly, the hitch receiver in the back -by Drawtite- was held by four 8.8s in the very back and two 10.9s in the front. Either they thought they only needed the 10.9s at the front where it's held by only one bolt on each side (vs 2 in the back per side), or they only had 2 on hand...
 
OK, BTT
anybody else with original bolt that could confirm the 8T?
anybody knows what 8T means?
 
Eric,

I'd just order a set from Dan. Toyota researched, tested and created specs for these bolts and due to their critical nature I would simply pay $10 for 4 of them myself.

DougM
 
IdahoDoug said:
Eric,

I'd just order a set from Dan. Toyota researched, tested and created specs for these bolts and due to their critical nature I would simply pay $10 for 4 of them myself.

DougM

sounds like that was the first place he went?

e9999 said:
Even C-Dan the omnipotent doesn't stock these suckers.
 
Dan can likely get them even though he doesn't stock them. I just got a whole shipment from him and wanted some pretty off the wall parts. I was surprised how many he DID stock, but some he ordered and squared me away just as quickly.

DougM
 
IdahoDoug said:
Dan can likely get them even though he doesn't stock them. I just got a whole shipment from him and wanted some pretty off the wall parts. I was surprised how many he DID stock, but some he ordered and squared me away just as quickly.

DougM


yes, but
a) I probably have some -or better- already
b) I don't like mysteries

so who the heck knows what an 8T is....?
 
RE: a) What's better? Toyota's tested their bolts specifically for the tow hook type, material, strength and leverage potential against the fasteners. A higher rated bolt may be stronger, but sustain hidden fracture damage from repeated rock strikes on the hook while wheeling, then one day kill your best buddy when it unexpectedly fails in a routine recovery. Not so sure anymore what's correct? Neither am I - but Toyota is and that's my point. Substitute bolts for your lugnuts, for the alternator mounting 'cause one dropped in the gravel, etc. But not on the recovery hooks. It is these bolts that will sustain THE highest stress on the truck are the recovery bolts. My 2 cents.

RE: b): Not a better reason in the world - heh.

DougM
 
well, I got some more of these mysterious 8T from Dan to use.

Still curious, though, what SAE or ISO grade are these equivalent to?

Anybody?
 

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