Leaderboard

So in metric grade 8.8 is equivalent to standard grade 5. 10.9 in metric is standard grade 8. If the nut held the torque it is probably okay. But just something to be aware of and a lot of people get confused.

Section 3 of the Washington state Backcountry Discovery Route with @RainGoat

Essential for these rigs. Im on the same page and every time I service mine Im so glad I've done it. Back on topic, the bolts on the rear trailing arms, especially the lower units on the axle side, will almost always be rust welded to the sleeve in the bushing and require a lot of work to get out (like cutting the bolt and/or bushing off entirely. When putting everything back together I reccomend liberally coating not only the threads but the entire bolt shoulder. This is usually what causes problems and is the area that sees the most abuse and wear, which is what causes the rust.

I can order flanged JIS stuff at my local bolt house. They service a big Toyota plant and a huge Kubota plant so it very well might be a special situation. I’m sure anyone can order flanged JIS nuts and bolts but maybe it’d have to be in larger quantities? Most JIS stuff is 10.9 and everything we use at my job is 12.9 so I usually use what we have and call it a kaizen hah! I used high strength M14 zinc plated threaded rod and welded a nut and washer to the one side. I also have a habit of completely coating anything I touch with copper anti-seize.

I agree that $50 is too much, but you won't find anything to match OE easily. Believe me, I've looked. The OE bolts are flanged M14 x 1.5 x 80mm (not including those nubs at the end), and the nuts are PTLN flanges. You won't find flange bolts like that, unless you want to pay >$20/ea for some titanium ones. You can look for M14 x 2.0 and 9/16"-18 x 3.25" sizes, but you won't find them in comparable quality to OEM. Either the flange won't be available (not even sure it exists for 9/16"-18), it won't be zinc plated (plain or black-oxidized hardly offer much corrosion resistance), or the length (especially 3.25") will be tough to find. You can find hex bolt options no problem, if you're willing to change to flat washers. But look, forget all that. The FSM doesn't spec replacing the bolts...it only specs replacing the nuts. If anything, buy a couple or more of the short bolts (54368-0W02A) depending on how gnarly yours look and 8 of the PTLN nuts (08918-6441A). That way you follow spec, and have some bolts handy should you have to destroy them out (it happens when you round a nut) or the threads get boogered. Short bolts are $2/ea and nuts $1/ea from nissanpartsdeal.com or courtesyparts.com (these are actual Nissan dealerships; use "nis10" at Courtesy for a discount). The long bolts (55080-0W00B) are what drive the cost up, at $6/ea, and they have those stupid shear-offs that prevent fitment in some places...avoid them.