Purchasing wheel studs & lug nuts that hold the knockoff adapter
07-17-2018, 07:24 PM
#1
Intermediate
Thread Starter
64 wheel studs
Are the wheel studs & lug nuts that hold the knockoff adapter on a 64 something special? Can they be purchased at any auto parts store & if so what would the size be?
Last edited by pippa; 07-17-2018 at 07:58 PM. Reason: wrong title
07-17-2018, 07:26 PM
#2
Team Owner
Member Since: Feb 2009
Location: Nearby Mayberry in NC
Posts: 21,298
Received 2,827 Likes
on
1,240 Posts
Crowd Plow For Now
I wouldn’t chance it..... buy from a C2 vendor and remove all risk. 
07-17-2018, 07:28 PM
#3
Administrator
Member Since: Jul 2000
Location: About 1100 miles from where I call home. Blue lives matter.
Posts: 51,419
Received 5,331 Likes
on
2,775 Posts
Would you like me to change the title of your thread to something related to the subject so people will have a reason to click on it?
07-17-2018, 07:36 PM
#4
Team Owner
Member Since: Feb 2003
Location: Sitting in his Nowhere land Hanover Pa
Posts: 49,008
Received 6,943 Likes
on
4,782 Posts
2015 C2 of Year Finalist
what’s so special about 7/16-20 studs that were used on millions of GM cars and truck for decades
and BTW The vendors are just going to sell you the same ones you can buy at a auto parts store only at inflated price
and BTW The vendors are just going to sell you the same ones you can buy at a auto parts store only at inflated price
Last edited by Nowhere Man; 07-17-2018 at 07:37 PM.
07-17-2018, 07:42 PM
#5
Intermediate
Thread Starter
07-17-2018, 08:43 PM
#7
Race Director
Member Since: Nov 2003
Location: Cottonwood AZ
Posts: 10,698
Received 3,048 Likes
on
1,934 Posts
C1 of Year Finalist (performance mods) 2019
07-17-2018, 09:16 PM
#8
Intermediate
Thread Starter
07-17-2018, 09:21 PM
#9
Team Owner
Member Since: Feb 2003
Location: Sitting in his Nowhere land Hanover Pa
Posts: 49,008
Received 6,943 Likes
on
4,782 Posts
2015 C2 of Year Finalist
If they are only hex stock with a 7/8 hex head and 7/16-20 threads I betcha fastnal or a local machine shop could make you what you need.
07-17-2018, 10:12 PM
#10
Intermediate
Thread Starter
07-17-2018, 10:32 PM
#11
Drifting
pippan
The wheel hub bolts are serrated, with a button-like head; they are not hex. The threadform is 7/16-20, & the lug nut across-flats size is 3/4, not 7/8. The shank length of the hub bolts changed in '65 from 1-3/8" to 1-3/4" ... likely to accommodate disc brake configuration. All material specs would be GM300M which is essentially a 'Grade 8' equivalent. Part numbers are/were as follows:
3775683 for 63-64. 7/16-20 x 1 3/8"
3864028 for 65-66. 7/16-20 x 1 3/4"
3910340 for 67-69. 7/16-20 x 1 3/4"
I think the real KO adapters will fit OK if you still have the shorter, OEM bolts. There are special longer lug nuts for this application. On the other hand, fitting direct-bolt reproduction KOs with shorter '64 OEM studs may be a problem.
The wheel hub bolts are serrated, with a button-like head; they are not hex. The threadform is 7/16-20, & the lug nut across-flats size is 3/4, not 7/8. The shank length of the hub bolts changed in '65 from 1-3/8" to 1-3/4" ... likely to accommodate disc brake configuration. All material specs would be GM300M which is essentially a 'Grade 8' equivalent. Part numbers are/were as follows:
3775683 for 63-64. 7/16-20 x 1 3/8"
3864028 for 65-66. 7/16-20 x 1 3/4"
3910340 for 67-69. 7/16-20 x 1 3/4"
I think the real KO adapters will fit OK if you still have the shorter, OEM bolts. There are special longer lug nuts for this application. On the other hand, fitting direct-bolt reproduction KOs with shorter '64 OEM studs may be a problem.
Last edited by vark_wso; 07-17-2018 at 10:37 PM. Reason: clarity
07-17-2018, 11:01 PM
#12
Safety Car
The longer version of what I posted is this. If you have the original studs, they work, they fit both the steelies and the KO adapter. Now if you need to replace a stud, they are available lots of FLAPS or Corvette parts suppliers. The nuts are about two times or more in length. I have never seen them other than GM or Corvette aftermarket suppliers. Find them somewhere else, great.
07-17-2018, 11:31 PM
#13
Burning Brakes
I want to clarify you are talking about the threaded wheel stud and not the five indexing pins that each adapter should have. Vark gave the correct info on the theaded studs and as pop23235 stated the lug nuts are longer as can be seen in this eBay listing https://www.ebay.com/itm/CORVETTE-19...LH_TitleDesc=0
07-18-2018, 07:52 AM
#14
Team Owner
Member Since: Feb 2009
Location: Nearby Mayberry in NC
Posts: 21,298
Received 2,827 Likes
on
1,240 Posts
Crowd Plow For Now
Last edited by MAD IN NC; 07-18-2018 at 08:03 AM.
The following users liked this post:
pippa (07-19-2018)
07-19-2018, 12:32 AM
#16
Intermediate
Thread Starter
Thanks' for all the reply's. It looks like the same studs for steel & aluminum wheels with spinners. The spinner lug nuts are longer than steel wheels. I purchase the studs & lug nuts from eckler's studs eckler's part number 25-127978-1 lug nuts eckler's number 25-108749-1