Brand bew driveshaft bolts sheering?

I fitted 24 of these bolts today without rounding any off, you need 2 hands and a small extension. Bottom of wheel top of gearbox, spin the wheel 180 and repeat.

 

Yep. 12-pointed tri-square. The one I got from JK was fine. Torx is a different profile.

 

And an assistant on the handbrake to make it easy peasyer

 

23ft lb is over 31 Nm. Seems very high for and m6 bolt, it would surely yield long before that. An M8 torque is
19- 26nm, 31 is even high for that.

 

Got them off. Eventually. Splined or Allen head? What's better in anyone's opinion?

 

splined if you use right tool