Windscreen & Fairing Metric Wellnuts
Bag of 10
 Size - M4 Metric Wellnuts
Fits Ducati 916 series / MV Augusta windscreen and others

About the Wellnuts
Replace your dried out and damaged rubber wellnuts with a fresh set from Desmoparts. These are the very uncommon M4 metric wellnuts that are found on just a handful of Italian sportbikes like the MV Augusta F4 and the Ducati 916 series bikes. I'm not aware of any M4 wellnuts on any Japanese or German motorcycles. Well-nuts typically do not last for the life of your machine and should be replaced periodically if dried out and cracked. Wellnuts are used as bodywork and windshield soft mount on a motorcycle, snowmobile, or other high vibration machines. Perfect for motorcycle windscreen or bodywork. Desmoparts has been selling stainless screw kits on eBay since 2002. We get frequent requests for metric well nuts and decided to offer them on eBay in lots of 10. We have a nearly unlimited supply so don’t be bashful and order as many as you require. This auction is for M4 but we also stock the more common M5, M6, and even M8 as well. See out other auctions if you require another size wellnut. Each item includes a bag of ten M4 wellnuts.

Sizing & Dimensions
We find most windscreen mounts need 5mm well nuts and fairing pieces commonly use both 5mm and 6mm. To determine if your stock well nut is an 4mm, 5mm or 6mm just measure the diameter of the screw threads that fit the well nut. As your old well nuts may be distorted and torn you must often measure the screw diameter to determine the correct wellnut size.

Specs on all Desmoparts M4, M5, M6, and M8 well nuts:

    M4 Metric Well Nut specs:
  • Overall Height: 12.67mm (0.499")
  • Barrel Diameter: 7.92mm (0.312")
  • Flange Diameter: 11.13mm (0.438")
  • Flange Height: 1.32mm (0.052")
  • Thread Pitch: 0.70mm
    M5 Metric Well Nut specs:
  • Overall Height: 16.89mm (0.665")
  • Barrel Diameter: 9.53mm (0.375")
  • Flange Diameter: 14.27mm (0.562")
  • Flange Height: 1.02mm (0.040")
  • Thread Pitch: 0.80mm
    M6 Metric Well Nut specs:
  • Overall Height: 16.00mm (0.630")
  • Barrel Diameter: 12.70mm (0.500")
  • Flange Diameter: 16.00mm (0.630")
  • Flange Height: 1.30mm (0.051")
  • Thread Pitch: 1.00mm
    M8 Metric Well Nut specs:
  • Overall Height: 18.30mm (0.725")
  • Barrel Diameter: 15.75mm (0.619")
  • Flange Diameter: 21.60mm (0.850")
  • Flange Height: 3.10mm (0.122")
  • Thread Pitch: 1.25mm

Terms
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