Crossmember hole size?

Previous owner had installed a non OEM skidplate that fastens to the crossmembers near the front of the truck. It was extremely rusty, so I had it sandblasted and linexed. When they removed it the bolts were toast and were discarded.

M8s are evidently too small, looking at pics, it seems the stock skidplate mounts to brackets that fasten into where my skidplate attached.

I bought some toyota M12 bolts (90119-12369), which I was able to thread in a few turns before they bind up. I'm unsure if its right pitch, or if it's just really rusty still in which case I'd like to chase the threads with the correct size tap.

Does anyone know the thread of these holes (see annotated random internet photo)?

 

Just went through this a few weeks back. The smaller bolt holes are m8x1.25 and the larger holes are

$13 m12x1.25 mm self-locking nylon insert hex lock nuts, pack of 6

m12x1.25 both are considered “fine” thread and i had to buy from a specialty hardware store because I couldn’t find the correct thread & length together at a big box hardware store.

I used m12 70mm & 65mm lengths for the front and middle bolts, the backs were m8 25mm.

A few of the holes in my frame had a lot of buildup so I chased the threads with a tap before bolting my skid on.

 

Amazing thanks DTMD! I'm going to invest in an

$13 M12x1.25 mm Self-Locking Nylon Insert Hex Lock Nuts, Pack of 6

M12x1.25 tap and will do the same. I see you have the 2.7, love the 4.0 but that 2.7 must be a lot more gas friendly. I'm fairly new to 2nd gen Tacomas, and definitely finding the gas consumption to be high despite driving very conservatively with the 6 speed. Has E-rated tires and slightly taller than cab box, so that probably doesn't help either...

 

If you're getting 19mpg, you're doing good. If you're getting 17, you're not necessarily doing bad.

If you do buy new bolts, look for JIS spec bolts - they will have the correct size flanged heads, and consider stainless if you can find them. EBay is a good source for small quantities.

 

I have 90119-12369 bolts, which from what I understand from the nomenclature is 69 mm thread length, I'm thinking they should work ok, they have a nice washer attached. I think they are actually for wheel bearing assemblies so it should be good strong enough and weather/rust resistant

Last tank I got 17.5 mpg, in the winter I had anywhere between 14-16 mpg, with E-rated studded tires, so I guess it's about normal

 

ACE Hardwares at least the slightly larger ones have all the metrics you need in diff pitches and hardness on hand. Limited stainless in 304 and marine grade.

 

M12 x 1.25 tap worked great to chase the threads, 4 bolts go in easy now. Unfortunately the 2 bolt holts (just past lower control arms) thread to the third crossmember with smaller holes, and I found a broken bolt in one of them . It's a stud at this point... guessing it's not coming out easy if the shop just left it like that