Question about bolts...

[Jeepster425]

So these style of bolts are torx drive, they bolt my doors to the hinges of my jeep. Now my question is is there a difference between these, where they're kinda tapered and don't have any threads on the bottom, and normal bolts that are threaded all the way down?

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[steveo3002]

id say theyre for easy fitment ...at the factory they were likley roared in with airtool and the pointed end helps it start

 

[Glen Vassallo]

Just like steveo said. That part at the bottom is to help start the bolt. You may use ordinary bolts of the same thread if you want.

 

[Super Mech]

The unthreaded part is called a pilot. It helps make the bolt find the female threads easier as to prevent cross threading during assembly.

 

[Jeepster425]

Perfect thanks guy

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[fourjeepin]

All the above are correct, but you don't need them. They won't prevent theft and aren't needed to hold the door on. I think the TJ model was the first to use these bottom bolts.

 

[Sco Deac]

If you haven't already done it, I recommend replacing the original bushings with the Derlin bushings. You can see from the bolt on the left how susceptible the hinge area is for corrosion on the Jeep. The Derlin bushings help with that and you will be grateful next summer when you go to remove the doors for the first time after a long winter in Spokane.

 

[rsanter]

Those bolts are hardened and the create/roll their own threads in the hole as they go in the first time.
That unthreaded part like said is the pilot but as you see the threads are tapered at the bottom as they are meant to bite into an unthreaded hole to start forming the threads.

Those could be replaced by regular bolts at this point and replaced with stainless if you wanted.

Bob

 

[KMdef9]

It's so a hammered employee doesn't cross the thread bolt when installing them hundreds of times in a day.

 

[Sine Swept]

Those guys carry taps!