Pack of 10.
At last we have managed to get a range of coachbolts and nuts made to special order..
The bolts are chemically blackened steel and the nuts are brass.
Measurements are in millimeters:-
A = 3.0mm
B = 1.5mm
C = 3.2mm
D = 0.8mm
E = 1.6mm
F = 20mm

The larger sizes will be needed for heavier vehicles and for axles bolts.

The smallest is the most popular size with a 1.6mm bolt and a nut 2.3mm across faces.