Wheel bearing nut size and thread??

[Tom L.]

Need a little help. Can someone tell me the diameter and thread size of the casle nut that secures the hub?? Thanks!!

[Alan S.]

Re: Wheel bearing nut size and thread??

Hi Lynn,
The info I have indicates 27/32"-20 for the 69-82 front spindle nut.
Perhaps Joe will verify.
Regards,
Alan

PS: I believe originally a 'slotted' nut was used, not a 'castle' nut.

[Ray K.]

Re: Wheel bearing nut size and thread??

Lynn

My Chev P & A catalogs confirm the thread size 27 / 32 x 20 as Alan stated. Original GM part #3953436, not sure if still in service.

Ray

[Dick W.]

Re: Wheel bearing nut size and thread??

I stand to be corrected, but I believe it is 3/4X20. I am not at the shop right now or I could look at the die I have

[Tom L.]

Re: Wheel bearing nut size and thread??

27/32nds, that's what I told the guy at the hardware store, he walked away from me... WTF!!! How, or who thought that dimension was a good idea???

Anyway, I need a nut to make an dapter for my camber/castor gauge, I don't have that size, go figure. Somehow I thought it would be simpler. Has anyone found one of these nuts anywhere other than a vette supplier?? Just wondering. Thanks anyway.

[Dick W.]

Re: Wheel bearing nut size and thread??

27/32nds, that's what I told the guy at the hardware store, he walked away from me... WTF!!! How, or who thought that dimension was a good idea???

Anyway, I need a nut to make an dapter for my camber/castor gauge, I don't have that size, go figure. Somehow I thought it would be simpler. Has anyone found one of these nuts anywhere other than a vette supplier?? Just wondering. Thanks anyway.

Probably 50 million other Chevrolet and GM vehicles

[Terry M.]

Re: Wheel bearing nut size and thread??

Have you tried an automotive recycler = junk yard. There is nothing magical about that nut on a Corvette. I would wager it is the same as millions of other GM cars up into the 80s and maybe even newer. If you don't enjoy digging around int he dirt, try your FLAPS. They should have it in the bubble packs marked HELP.

It is not a standard industrial or home store item, but it is a common automotive item. Go hunting in the right place. You won't bag a giraffe or lion in Kansas.

[John H.]

Re: Wheel bearing nut size and thread??

I've never heard of a 27/32"-20 thread on anything. I think the P&A30B has it listed incorrectly. Mine (7/73 issue) shows Grp. 6.022, #378137 nut, 3/4"-20 for '53-'74 Corvette, then right below it lists #3953436 nut, 27/32"-20 for '69-'73 Corvette. I've never seen a spindle nut that wasn't 3/4"-20.

[Joe L.]

Re: Wheel bearing nut size and thread??

I've never heard of a 27/32"-20 thread on anything. I think the P&A30B has it listed incorrectly. Mine (7/73 issue) shows Grp. 6.022, #378137 nut, 3/4"-20 for '53-'74 Corvette, then right below it lists #3953436 nut, 27/32"-20 for '69-'73 Corvette. I've never seen a spindle nut that wasn't 3/4"-20.

John------

Well, as strange as it may be, there is at least one thing that is threaded for 27/32-20 thread size and that one thing is 1969-82 Corvette front spindles. Actually, some other Chevrolet front spindles were also this same thread beginning in 1969. Why was this oddball size used" I have not the faintest idea.

[Ray K.]

Re: Wheel bearing nut size and thread??

I also have never heard of that thread size -- 27/32" x 20. My earlier '69 P&A lists the 378137 for 53 -68 Corvette plus all pass cars with the 3/4" x20 thread. The '69 Corvette and pass car with disc brake require the 3953436 nut - no thread dimension listed. There is also a nut for early truck applications #379656 which has the descriptive 27/32" x 20 thread referenced. ??

Ray

[Terry M.]

Re: Wheel bearing nut size and thread??

John------

Well, as strange as it may be, there is at least one thing that is threaded for 27/32-20 thread size and that one thing is 1969-82 Corvette front spindles. Actually, some other Chevrolet front spindles were also this same thread beginning in 1969. Why was this oddball size used" I have not the faintest idea.

Joe, are you suggesting that the front spindle nut for 1969 to 1982 Corvettes is different than passenger cars of the same era?

[Joe L.]

Re: Wheel bearing nut size and thread??

27/32nds, that's what I told the guy at the hardware store, he walked away from me... WTF!!! How, or who thought that dimension was a good idea???

Anyway, I need a nut to make an dapter for my camber/castor gauge, I don't have that size, go figure. Somehow I thought it would be simpler. Has anyone found one of these nuts anywhere other than a vette supplier?? Just wondering. Thanks anyway.

Lynn------


A good source for these nuts? GM. The nut is still available under GM #3953436 for about 4 bucks. You can also get them as manufactured by Dorman Products under their number 615-057. However, the Dorman piece is a CASTLE nut and original GM is a SLOTTED nut.

[Joe L.]

Re: Wheel bearing nut size and thread??

Joe, are you suggesting that the front spindle nut for 1969 to 1982 Corvettes is different than passenger cars of the same era?

Terry------


Well, it's different than most other passenger cars of the era. However, 69-70 full size Chevrolet passenger cars with disc brakes also used this nut. No other applications I can find, though.

[Terry M.]

Re: Wheel bearing nut size and thread??

Terry------


Well, it's different than most other passenger cars of the era. However, 69-70 full size Chevrolet passenger cars with disc brakes also used this nut. No other applications I can find, though.

Damn, then I was wrong -- there ain't millions of them out there.

[Dick W.]

Re: Wheel bearing nut size and thread??

If you are looking for an experienced nut, check this application chart out http://bit.ly/LyRhNV BTW Dorman also references the 27/32X20 thread