Question….does anyone happen to know the bolt size that holds that thing to the frame. This bash plate is almost right under the front bumper and has 3 front bolts and 2 rear. The mounting holes are threaded.

We moved a few years ago and I got rid of all my bolt bins and tap n die set (so annoyed at myself) so I am down to guessing at this one.

Thanks!

 

Not sure, but I believe the hex head is a 14mm size, but I will look at mine tomorrow and make sure. If it is a 14mm hex head, then it would be the normal threads like the bolts that hold the seats to the floorboards.

 

Best I can tell with the calipers it is going to be an M9 or M10. The inside of the threaded hole measured 8.12mm another 2mm’ish of threads makes it an over bored M9 or under bored M10. Then again I am no machinist. I will however have access to a tap n die set this weekend so that should help me size these holes up.

 

I don't know of anything being M9.

 

I hope you are correct but between my measurements and Meb2000 saying he remembers them being a 14mm head, I am nervous. Most m8 bolts have a 13mm head head and most m10’s have either a 15mm or 16mm if my memory is still somewhat intact.

Hopefully an m10 tap will slide right in there.

 

Yes, for European and USA. Japanese vehicles - including those made in USA like my 1998 and 2004 Frontiers - use JIS hardware which means M8 (8mm x 1.25mm) threads have a 12mm wrench size.


On my Frontiers, there are plenty of M10 thread hardware that take 14mm wrench size, such as the 130mm long alternator pivot bolt. I RARELY need to use a 15mm or rarer still a 16mm wrench.

I'd go to Ace Hardware and buy some M8 bolts (those will have a 13mm head) and some M10 bolts to have around. Note that M10 bolts can be of different thread pitches, so get several types.

On my 1988 B2200 2WD, its little steel engine protective plate is held by four bolts, all 8mm x 1.25mm with a 12mm socket size.

 

Whew, thanks….that is a lot of interesting info. I did try an M8 from my Kawasaki KLR650 stash but it slid right on through. I’ll try several M10 taps when I get my hands on that tap n die set. I am headed out today on my Honda AT but I refuse to go into town this close to a weekend. Too many tourists still flocking around up here.

 

Sorry! I forgot about measuring the skid plate bolts on my 4x4 truck! If we get through this storm event we're in the middle of right now, I will update this! Getting lots of wind and rain right now......our timeshare over in Ormond Beach is getting pounded by the ocean waves again......their pool deck is collapsing as the sea wall was breached during hurricane Ian.......and the angry ocean is trying to claim their/our property! We will probably not be able to stay there in May 2023.........they have been closed since Ian, and I don't see them reopening anytime soon! Lots of East Coast erosion going on right now on our Florida beaches!!

 

Check out the Flagler Beach Live Cam.......


Most of the Ormond beach cams are offline right now.....Flagler is 20 miles or so North of Ormond Beach.

 

Wow! Looks pretty wicked and apparently getting worse as the day goes on. Find some high ground and stay safe.