Just as an update and FYI in respect of the 11/16 spanner sized nyloc's (YN2910)
Called Canley to confirm spanner size of this nut before ordering, which they duly confirmed it was the right one.. Excellent, so I ordered. They duly arrived and guess what they were wrong..
So I called to enquire as to why I had received the wrong size....... I simply got told "do I not have a 5/8's spanner that I can use with them", to which I replied "I do have a 5/8's spanner, but you don't have the correct 11/16's nuts that you said you had"... At that moment I was very unimpressed with their attitude, and needless to say they don't have them.... . Having calmed down I find it amusing now but it was not very customer focused. Needless to say I wont be using them again for anything..
Also tried Arun Fasteners and spoke to them about there offering.... They also confirmed that the Nyloc is not an 11/16 nut.
Just thought I would share...
So that leaves Chris Witor......
Arun do several 7/16" nylocs. This one:
UNF.NIN.7/16.Z.AF 7/16 UNF Nylon Insert Nut x 0.687 A/F Zinc
says 11/16" A/F ??? Perhaps they did not understand the question?