steering wheel nut size.

M

markinmtns

Freshman Member

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• Mar 23, 2010

• #1

What size is the nut that fastens the steering wheel down on a 78' spitfire? and are there other british cars that may share the same size? I've got this great project that came with a new aftermarket wheel but no nut to secure it to the column. I tried looking around the internet and came up with a measurement of 9/16 x 1 1/16 UNF but it was way off. Near as I can tell my calipers read .800 across the threads on the column.

 

Tinkerman

Darth Vader

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• Mar 23, 2010

• #2

Mark I miked mine and came up with .870 which is a little larger than yours but I have a TR3A which may explain the difference. I suggest two sources for you to call: one is The Roadster Factory, 800.234.1104 I bought my steering wheel nut from them recently and It was five or 6 dollars. Another source would be Mark at British Auto, 315.986.3097 he carries new and used parts and really knows his stuff.

Good luck, let us know how you make out.

Cheers, Tinkerman

 

OP

M

markinmtns

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• Mar 23, 2010

• #3

Thanks Tinkerman. I'll give 'em a call this afternoon. I'm just getting into LBC's so I'll have lots of questions. By the way those early TR3's have been my favorite sportscar since going for a ride in one at a young age(9) when they were still seen around. It was a white one with red interior and the young man happily gave all us kids rides around the church while at a wedding (I got to go twice!.

 

TR3driver

Great Pumpkin - R.I.P

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• Mar 23, 2010

• #4

I'm pretty sure the TR3 steering nut is unique, due to the hollow steering shaft.

According to the Moss UK website
https://www.moss-europe.co.uk/Shop/ViewProducts.aspx?PlateIndexID=3170
the nut you need depends on whether your car is before or after approximately FH100020. The early column takes P/N 105438, the later one 138466.

Both parts appear to be available from TRF
https://the-roadster-factory.com/

 

Andrew Mace

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• Mar 23, 2010

• #5

...and that change is around 1977, I think, when Triumph phased out the Herald-based "Impacto-Scopic" column and rationalized the TR7 column in the Spitfire.

 

OP

M

markinmtns

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• Mar 24, 2010

• #6

Thanks for your help guys, wow so much knowlege! My car is #FM766**** so I'll order P/N 138466 other wise I'll just grab a hex nut off a TR7 (kidding). Sure would be nice to find the UNF size. then I could get it at a well stocked hardware supply.

 

K

KSIS

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• Mar 24, 2010

• #7

I know the nut sized is the same for the early spits and spits with the locking column. I cannabalized the steering column from a 76/77 spit to use in my 63. The only difference was the welded on collar for the lock. The nuts are the same size.
This doesnt sound right, but I have a spare nut.

 

TR3driver

Great Pumpkin - R.I.P

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• Mar 24, 2010

• #8

markinmtns said:

Thanks for your help guys, wow so much knowlege! My car is #FM766**** so I'll order P/N 138466 other wise I'll just grab a hex nut off a TR7 (kidding). Sure would be nice to find the UNF size. then I could get it at a well stocked hardware supply.

Click to expand...

I don't know about that nut in particular; but many of them are not UNF. The TR and Stag nuts are both UNS sizes, which my local hardware-only supply didn't stock.

Generally, any Triumph fastener that isn't "special" in some way will have letters in the part number. For example, a 3/4" UNF nut is HN2014.

 

Andrew Mace

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• Mar 24, 2010

• #9

I don't know about the nut on the TR7-style column, but the one on the earlier column is an extremely fine thread; I don't think it's "typical" UNF?

 

OP

M

markinmtns

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• Mar 25, 2010

• #10

You guys are great....and right. really fine thread UNS.

 

Mickey Richaud

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• Mar 25, 2010

• #11

Steering wheel nut size? About 5'9", 160# in all the cars I drive. :wink: