Wheel nuts (for Magstar wheels) - thread size

mrtask

mrtask

Well-Known Member
I have the wrong type of wheel nuts holding my Magstar wheels onto my P6. They don't have the conical seat, so they're chewing into the alloy of the wheels! I have been offered a set from the US which the vendor describes as "1/2-20 thread and 3/4" hex". A previous post on here about this subject suggests I need "7/16" unf thread with a 3/4" hex". Not really understanding how threads are measured, are these both the same, or am I being offered the wrong thing?
 
If I remember correctly, the Magstars are American, so would almost certainly have come from a car with 1/2unf studs, whilst the Rover has 7/16unf studs, so I believe the stud holes will be larger.

Fitting the correct wheel nuts will be more important for secure location of the wheels due to the larger holes. On mine I fitted MGB wheel studs, 1/2unf, which have a similar spline to the Rover that is compatible with the holes in the hubs.
 
I will have to check mine but i'm pretty sure the studs are just standard P6 (7/16").
I seem to recall sitting the car on standard wheels and nuts when I was cleaning up the Magstars years ago. The only American cars that may have had larger studs were the handful of '66-'67 cars fitted with Magnum 500 wheels that had a different pcd.
 
KiwiRover said:
I will have to check mine but i'm pretty sure the studs are just standard P6 (7/16").
I seem to recall sitting the car on standard wheels and nuts when I was cleaning up the Magstars years ago. The only American cars that may have had larger studs were the handful of '66-'67 cars fitted with Magnum 500 wheels that had a different pcd.
Click to expand...

I believe this is correct. The Magnum 500 wheels had the large studs and a different bolt circle, 4.75 rather than 5" as I recall. It was rather more than a handful, BTW. More like a few hundred cars were equipped with Magnums before the Rostyles replaced them.

Yours
Vern
 
Vern Klukas said:
KiwiRover said:
I will have to check mine but i'm pretty sure the studs are just standard P6 (7/16").
I seem to recall sitting the car on standard wheels and nuts when I was cleaning up the Magstars years ago. The only American cars that may have had larger studs were the handful of '66-'67 cars fitted with Magnum 500 wheels that had a different pcd.
Click to expand...

I believe this is correct. The Magnum 500 wheels had the large studs and a different bolt circle, 4.75 rather than 5" as I recall. It was rather more than a handful, BTW. More like a few hundred cars were equipped with Magnums before the Rostyles replaced them.

Yours
Vern
Click to expand...


Vern is correct. I have both Magstars and Magnum 500's here. The 500's will not fit on my other two parts Rovers because of the larger studs and different hole pattern.
 
Geordie Jim said:
Sowen,
Look at this guy, http://www.mistertee.co.uk/index.html
you need to measure your wheel, and tell him what car, but he will fix you up.

Jim.
Click to expand...

Sorry but I don't quite get what you mean?

In my collection of Chevy and Buick steel wheels (3 sets) they all have large stud holes to suit 1/2unf wheel studs. I had the current set fitted on my P6 with the standard 7/16unf studs while I was still building it and they didn't feel like they were locating as squarely as what the larger studs do.
 
Simon,
The nuts you require will have 7/16 UNF threads to fit the P6 studs, but instead of the taper, they will be sleeve nuts.
The sleeve outside diameter will fit into the hole in the wheel. These nuts come with a washer which the nut hexagon fits to, to retain the wheel.

If you are still puzzled I can post a picture.

Jim.
 
Geordie Jim said:
Simon,
The nuts you require will have 7/16 UNF threads to fit the P6 studs, but instead of the taper, they will be sleeve nuts.
The sleeve outside diameter will fit into the hole in the wheel. These nuts come with a washer which the nut hexagon fits to, to retain the wheel.
Click to expand...

This is the arrangement with Bruiser's Revolutions.
 
Geordie Jim said:
Simon,
The nuts you require will have 7/16 UNF threads to fit the P6 studs, but instead of the taper, they will be sleeve nuts.
The sleeve outside diameter will fit into the hole in the wheel. These nuts come with a washer which the nut hexagon fits to, to retain the wheel.

If you are still puzzled I can post a picture.

Jim.
Click to expand...

But I don't need any sleeve nuts?
 
The nuts you want are:

20 x 3-4'' Hex Bulge ET wheel Nut - 7/16''

They look like this:



And you can buy them here:

http://www.raceways.co.uk/USA_3-4''_Hex ... el_Nut.htm

I had Magstars for a while which I imported from the USA. They came with the original nuts but they were badly corroded. These replacements are the exact same fit on the wheel.
 

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Many thanks Keynsham for the info, photo and link.
There was a little confusion earlier in this thread as to who was enquiring about what, but many thanks to everybody who contributed.
I'll get some of these correct wheel nuts before I refit my Magstars next spring/summer. I need to have them shod with some better tyres first, not entirely happy with the 'Nankang' brand I was rolling around on.
If anybody has a single spare Magstar center cap that they'd like to sell me for a reasonable ransom, please don't hesitate to get in touch! I still have the corresponding inner piece, I just need one outer cap to replace one which came unstuck and parted company with my car at some point.
 
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