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Minimum Thread Engagement for Wheel Nuts

Lug nuts, lug bolts, and wheel locks should always be tightened to the recommended torque specifications found in your vehicle's owner's manual. Safe and proper installation requires using the correct tools and procedures. This will prevent over-tightening the wheel fasteners, stripping the fastener threads, and stretching the studs.

The thickness of a wheel can differ from original equipment wheels to aftermarket wheels. For that reason, it’s critical to verify that the wheel nuts or lug nuts will properly engage the threads. Refer to the chart below to determine the number of turns, or the depth of engagement, typical for your stud or bolt size.

Bolt/Stud Size Number of Turns
M14x2.0 7
M14x1.5 9.5
M14x1.25 11
M12x1.75 7
M12x1.5 8
M12x1.25 9.5
1/2"-20 10
5/16"-18 6
7/16"-20 8.5
9/16"-18 10


Jacob Krebs - April 10, 2023

2015 ford edge se. I went to ford dealer and measured length of oem lug nut. It is 1 3/8 inches. Aftermarket lug nuts vary in length.

Dennis Beroukas - January 4, 2021

Hi, I was looking at purchasing the set of 24 Chrome 14×1.5 Open End Duplex ET Spline Tuner Lug Nuts for Aftermarket Wheels which are also an extend thread lug. I purchased aftermarket wheels and the new lugs fitted to my 4×4 Landrover Discovery 3 which I do take off road a lot only take up 6.5 turns of the new M14 1.5 lug. By purchasing your set been extended I was hoping it will assist in achieving the 9.5 turns that I need playing it safe right.
As you quote online "Extended thread lug nuts are NOT intended to achieve additional thread engagement on your wheel’s lug studs. Proper thread engagement begins once the wheel’s lug stud has threaded past the seating area of the lug nut.
So my question should I purchase your set of lugs will this help or not?
Or 6.5 turns is sufficient?
Thank you

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