What was the name of the supplier?,if you dont mind sharing your source.

Well Nut 5WN16A

Minimum order Qty x 100
Price £35.77 / 100
Carriage £10.00 for all orders below 20kgs within the UK
Delivery 2/3 days from receipt of order.
Rivetwise & Fastenings Ltd
Tel: +44(0)121 766 5445
Fax: +44(0)121 766 5711
sales@rivetwise.co.uk

I can get a box of 100 for about £17 + vat....... !

Any details you would care to share?

Can you tell us where, I sort of ran out of time searching and to be honest bought mine for "work" but would like to get them cheaper next time.

Yes Please :)