Lug nut size

This is place to talk anything Cougar or Cougar related.
Post Reply
drewk86
Registered Member
Posts: 14
Joined: 08 Aug 2017, 08:59

Lug nut size

#1

Post by drewk86 » 26 Jan 2018, 14:44

I'm needing to order some new lug nuts for my 68 to go with its Torq Thrust D rims . What size lugs do I need? 1/2?

Thanks

User avatar
Royce
Registered Member
Posts: 1146
Joined: 22 Oct 2011, 07:14
Location: Dallas, TX

Re: Lug nut size

#2

Post by Royce » 26 Jan 2018, 14:49

1/2" - 20 NF RH
1968 GT-E XR-7 W code 427 Augusta Green / Saddle
1968 XR-7 R code 428CJ Ram Air Red / Black
1910 Model T Ford Touring Red / Black
1914 Model T Touring Maroon / Black
1915 Model T Ford Touring Black / Black
1917 Model T Ford Torpedo Runabout Green / Black
XR7-G Registrar

User avatar
Midlife
Registered Member
Posts: 463
Joined: 25 Mar 2014, 16:36
Location: Florida Panhandle
Contact:

Re: Lug nut size

#3

Post by Midlife » 26 Jan 2018, 18:51

Royce wrote:
26 Jan 2018, 14:49
1/2" - 20 NF RH
That should be UNF not NF.

User avatar
Royce
Registered Member
Posts: 1146
Joined: 22 Oct 2011, 07:14
Location: Dallas, TX

Re: Lug nut size

#4

Post by Royce » 28 Jan 2018, 12:40

You are correct only because there is no difference between the two threads. So while you can use a 1/2" - 20 UNF tap to thread a lug nut, it didn't get made that way. The use of 1/2" - 20 NF threads on Ford product lug nuts predates the ANSI/ASME change to UNF designations. So a tap and die set like the Snap On one in my garage has some dies and taps marked NF because there was no need to change tooling. 1/@" -20 NF is one that is still marked NF because that's what it is. I bought this tap and die set in the late 1970's so I don't know what Blue Point sells today. Maybe they are marking them UNF now.



Midlife wrote:
26 Jan 2018, 18:51
Royce wrote:
26 Jan 2018, 14:49
1/2" - 20 NF RH
That should be UNF not NF.
Attachments
half inch - 20 NF Blue Point Die.jpg
half inch - 20 NF Blue Point Die.jpg (98.44 KiB) Viewed 206 times
1968 GT-E XR-7 W code 427 Augusta Green / Saddle
1968 XR-7 R code 428CJ Ram Air Red / Black
1910 Model T Ford Touring Red / Black
1914 Model T Touring Maroon / Black
1915 Model T Ford Touring Black / Black
1917 Model T Ford Torpedo Runabout Green / Black
XR7-G Registrar

Post Reply