From the enquiries I have made, I believe that these are 6BA thread size, but I have quoted the actual sizes as well. I have many more Bolts, Self Tappers and other Spares. Size: 6.7mm x 2.7mm. We hope that you understand.
HORNBY 10x BRASS FLAT HEAD BOLTS 8BA size possibly S1011 NEW L
PECO SL-702FB 10x 36" Flat Bottom Code 143 0 Gauge Flexible Track Concrete Sleep
HORNBY DUBLO TEN FLAT Couplings (Part- 21400) New Original LAST FEW