Was looking for the lug nut torque on my old '66 C60 today...found it in the owners manual. Spec for flanged one-piece nuts is 3-400 ft/lb.
The strange thing is I measured the wheel stud thinking they would be either 5/8 or 3/4" but no....they're 11/16 dia. Never heard of studs that size and Mr. Google doesn't seem to have heard of them either.
A day without laughter is a day wasted- Charlie Chaplin When wrestling a grizzly bear, you have to keep at it until the bear gets tired, not when you get tired. 1948 Chevy 2-Ton
This screenshot from a 1966 Chevy Master Parts Book for Medium/Heavy Duty trucks shows your 1966 C60 came with 11/16" wheels studs/lugs. Granted this is just specifically ID'ing the front wheel studs, but the rears would be the same diameter. Note that they are left and right hand thread per the descriptions.
~ Dan 1951 Chevy 3 window 3100 Follow this story in the DITY Gallery "My Grandpa Carl's Truck and How it Became Mine" 1966 Chevelle (Wife's Hot Rod) | 2013 Chevy Silverado (Current daily driver) US Army MSG Retired (1977-1998) | Com Fac Maint Lead Tech Retired (1998-2021)
Interesting that they still list them as having RH/LH studs. Mine has all RH studs. It also has the dreaded "widow maker" split rims. I replaced the two front rims with 22.5 solid rims made in Turkey. I'd replace the other four but last time I looked I couldn't find them. Anyway they would cost more than the truck is worth at this point.
I got all six of my 22.5" wheels there too, and it cost me $1800 including shipping. Buy once, cry once as they say. They're 20lbs apiece heavier than the Accu-Ride repops from the late '90s, but those are also scarce as hen's teeth nowadays. A new wheel you can buy is better than the old one that you can't.
Anyway, it's a great way to get into tires that are modern and easy to source-and also that tire shops will work with because the new rims don't have the habit of exploding, and killing tire techs.
The only downside to the new rims is they're 3/64" thicker than the originals, so you might need new lug studs on the rear axles.
Anyway, it's a great way to get into tires that are modern and easy to source-and also that tire shops will work with because the new rims don't have the habit of exploding, and killing tire techs.
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RH5 were by far the worst but any of the muli-piece wheel can kill!
BC 1960 Chevy C10 driver 261 T5 4.10 dana 44 power loc 1949 GMC 250 project in waiting 1960 C60 pasture art Retired GM dealer tech. 1980 - 2022
