You can if you want, - pretty sure both AK and I are correct on the bolts #. Heads aren't going to the same unless you replaced them with something goofy lol. They are 13mm w/10mm shank (threads) . But yea, easy enough to run one out for a look see and pic. Yea, get a pick, - interested to see what you have going on there. I'll do the same.

 

Didn't replace them on either truck. Only time I removed them was to paint the plates.

I'll get a pic when I get home...... drove the 'Yota to work today.

 

I better win this one.

 

Almost there.....shii, she has it parked in the grass, knees are going to get wet. Well, coffee first..I'll through down a floor mat or something lol.

 

Yea they are 13mm (hex) as said with 8mm threads/fasteners. At least that's what Ford used on the 98.

Uploaded some pics here, - https://www.f150forum.com/g/album/11497121.

This was fun, gotta go!

 

Maybe I'm smoking the crack.... LOL. We'll see when I get home.

 

They are both 10mm heads. Top is the F150, bottom is the Expy. I can see that the Rustoleum is holding up better than the Walmart special paint.....

 

Huh, weird.. Well, looks like AK had it wrong then, hell, I thought he was right. So they used both 13mm and 10mm hex heads...fasteners take a 8mm or 5/16 bolt. At least the factory ones do.

If you use a 10mm hex, you'll just have to make sure they are flanged or washered bolts is all, - (whites pics) and you'll be alright.

 

I guess I coulda zipped one of those off real quick to look at the threads. It's so damn cold right now, I just took the pics and ran back in, LOL. I'm pretty sure they are 8 mm threads too, though.

EDIT: Just looked at my phone - 15 degrees out right now. UGGGH!!!

 

Thx. I got the bolts with the skid plate though. Im not that stupid. just havent had chance to look at em.

I actually figured my truck must have had the skid plate originally and first owner removed for maintenance and never put back. Im guilty of that on two vehicles. Couldnt change oil filter without removing front plate. I was disgusted to find no nuts, clips, just gaping holes. What should be 5 minutes ....just turned into a pita.

Look like 10mm head, i mic the thread thread at 7.79 mm.

I got half mind to drill new holes and tap the frame instead .