"These pull handles are not fit for purpose. The plastic brackets are so weak and brittle that the slightest knock or uneven pull will shear the handles straight off of the doors and send shards of brittle plastic everywhere.
I fitted six pairs and four failed within a week. The remaining two were removed and found to have developed cracks around the brackets.
If the nut was mounted securely to the handle itself it would probably be ok, but the plastic is a weak point and stress between the nut and the bracket had either failed or was close to failing in 100% of the handles fitted.