What do you call the M14 flange nuts for hub motors?

[kylerlaird]

I bought a bunch of M14x2.0 flange nuts for my hub motors. The problem I have with a new build is that the flange is a little too big - almost 29mm. Bolts that came with some of my motors are 26mm. The larger flange conflicts with the head of the screw I'm using in my current dropout (Messingschlager Fat Bike Hi Tensile Fork).

How do I find some more of these minimal flange nuts without buying kits full of other stuff?

 

[marty]

McMaster-Carr

McMaster-Carr is the complete source for your plant with over 595,000 products. 98% of products ordered ship from stock and deliver same or next day.

www.mcmaster.com

 

[aroundqube]

No flange diameter given here , but ask them Axle Nuts & Washers

 

[calab]

You can't file it down to fit?
Dremel would be quicker.

 

[kylerlaird]

You can't file it down to fit?
Dremel would be quicker.

Oh, I have thought about chucking one in the lathe a couple of times. I'd like to avoid that hassle, though. I want something that can be easily replicated.

 

[kylerlaird]

McMaster-Carr

McMaster-Carr is the complete source for your plant with over 595,000 products. 98% of products ordered ship from stock and deliver same or next day.

www.mcmaster.com

I don't see any M14 flange nuts at McMaster. Their M12 nuts have a 26mm flange, though, so they're obviously "large flange." (I'm making up a label since I don't know what else to call them. "Fat flange"? "Do these flanges make my nuts look small?")

 

[marty]

I look at:

McMaster-Carr

McMaster-Carr is the complete source for your plant with over 595,000 products. 98% of products ordered ship from stock and deliver same or next day.

www.mcmaster.com

Click:
System of Measurement
✓ Metric

Thread Size
✓ M14

Nut Type
✓ Flange

Thread Pitch
✓ 2 mm

See 11 Products. Click Product Detail to see drawings and dimensions.

 

[kylerlaird]

I look at:

McMaster-Carr

McMaster-Carr is the complete source for your plant with over 595,000 products. 98% of products ordered ship from stock and deliver same or next day.

www.mcmaster.com

Click:
System of Measurement
✓ Metric

Thread Size
✓ M14

Nut Type
✓ Flange

Thread Pitch
✓ 2 mm

See 11 Products. Click Product Detail to see drawings and dimensions.

Ah! I was clicking on the individual categories and looking through the sizes.

McMaster-Carr

McMaster-Carr is the complete source for your plant with over 595,000 products. 98% of products ordered ship from stock and deliver same or next day.

www.mcmaster.com

I should have done the search. Thanks!

Unfortunately it looks like the minimum flange diameter they have is 28mm.

--kyler

 

[marty]

Just forget the flange and use a nut.

 

[kylerlaird]

Just forget the flange and use a nut.

I'm ready to do that. I'd assumed that flange nuts offered a clear advantage in this situation, but I'm not seeing it. It's a 14mm nut that undergoes very little pullout stress and shouldn't be tightened hard. What's the purpose of the flange? Sure, the serrations aid in keeping it tight, but I'd feel a lot better with a stop nut. (My torque arm fully captures the axle, so even with the axle nuts removed, the axle won't budge.)

Thanks for the suggesting this. I feel more confident going this route now.

 

[marty]

I'm ready to do that. I'd assumed that flange nuts offered a clear advantage in this situation, but I'm not seeing it. It's a 14mm nut that undergoes very little pullout stress and shouldn't be tightened hard. What's the purpose of the flange? Sure, the serrations aid in keeping it tight, but I'd feel a lot better with a stop nut. (My torque arm fully captures the axle, so even with the axle nuts removed, the axle won't budge.)

Thanks for the suggesting this. I feel more confident going this route now.

No! don't listen to some random stranger on the internet. Better to hire 12 or so engineers, mechanics, and bicycle experts and get 12 or so different answers to the same question.

 

[marty]

shouldn't be tightened hard

Do tighten it hard enough so in don't come loose. Don't tighten it so tight that you srtip the treads.

 

[A-DamW]

What's the purpose of the flange?

To spread the pressure over a larger surface area.

 

[kylerlaird]

To spread the pressure over a larger surface area.

Yes, but is that really needed for an M14 nut on a bike wheel axle? The area of a regular M14 nut is probably not much less than the area of the original M10 flange. (I should check...)

 

[A-DamW]

You should be fine with out a flange, but a washer in it's place may be a good idea.
I have plenty of bikes without flanged nuts, but I always use a washer, keeps the dropouts from getting chewed up, and can spread the pressure evenly.

 

[kylerlaird]

You should be fine with out a flange, but a washer in it's place may be a good idea.
I have plenty of bikes without flanged nuts, but I always use a washer, keeps the dropouts from getting chewed up, and can spread the pressure evenly.

Yes, if I were going into the dropout, I'd definitely need a washer or two. There will be a steel torque arm under it, though, so I think that should suffice.

 

[A-DamW]

Yes, if I were going into the dropout, I'd definitely need a washer or two. There will be a steel torque arm under it, though, so I think that should suffice.

I concur.