what is the hex size on the brake bracket on a non-super duty 99 f-250
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4wd Low
Joined: May 2020
Posts: 12
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what is the hex size on the brake bracket on a non-super duty 99 f-250
I'm replacing the rotors on my 99 ford f-250 light duty not a super-duty. I used a hex allen socket in an attempt to remove it and am now using the vise grip to try to remove it. Is it an metric or some off size sae hex? I don't relish the thought of trying to remove the remaining three like this. Thanks for any help.
Fleet Mechanic
Joined: Jun 2023
Posts: 1,365
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From: WA
Can't really tell what you're talking about. Pretty sure the bracket (anchor plate) on my F150 has an 18 mm hex head bolt. With factory thread locker and the high torque setting, 136 ft-lbs, they were very difficult to remove. Some heat to soften the thread locker, a breaker bar, and a high quality 18 mm socket or closed end wrench might be what you need. I think that I might have used a closed end wrench and a 3 lb mallet to break them free, it was years ago. They were tough.
Last edited by BareBonesXL; May 10, 2026 at 09:44 AM.
Hotshot
Joined: Jul 2020
Posts: 10,401
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From: Near Salt Lake City
The ones held on by Torx would be a T50 or T55
But
Like BareBones said, your caliper brackets should be held on by two 18mm hex head bolts
Post a picture so we are all on the same page here
But
Like BareBones said, your caliper brackets should be held on by two 18mm hex head bolts
Post a picture so we are all on the same page here
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4wd Low
Joined: May 2020
Posts: 12
Likes: 2
Thanks Bare Bones and manicmechanic007. I obviously misspoke the internal hex bolt which came with the replacement calipers and bracket turned out to be a 6mm hex headed bolt. This accounted for me rounding off the internal hex and misinformation from a local garage (gave me the wrong torque specs 44-46). Which lead me to torque specs of 166 for the caliper bracket when it should have been as BareBones stated 136. The slide pins should be 26.
As I now understand it my F-250 light duty 7 lug was something of a transition model moving to Ford's super-duty.
The single "tanged" pad should always be installed closest to the engine side on both of the calipers.
As I now understand it my F-250 light duty 7 lug was something of a transition model moving to Ford's super-duty.
The single "tanged" pad should always be installed closest to the engine side on both of the calipers.
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