7/16" rivets.
 

I have 40x 7/16" by 1 3/8" long rivets which have an 1/2" head on them. Came from Sapphire rivets last year. £20.00 with no VAT. Happy to post at cost or can be collected from Liskeard in Cornwall.
Please contact David if you require any further details on 07779 722392.