A- 1842-1915 period
Before the model 1895 we find screws, always brass made, on all mounts and wappens of the helmets except the Prussian model 1867 (this have no screws).
Bade and Saxon M67 helmet have, them, screwed wappens.
For M.95, except the small screw, brass made, located on rear spine at the level of the neck cover, we find only this screws on the extrahelm and Eigentumsstück (private purchase helmets).
Exception: Hessian helmets which have his mounts with screws (except the wappen with loops).
Whatever the model, all these screws have a special threading, very different from modern ISO metric thread and , as yet, it was not reproduced except by molding; but, in this case, we can see difference: the thread have no raised pattern and diameter is weaker.
Original screws have 3,4mm diameter with 10. metric old thread .
(3,4 mm is a middle of 18 measures)
The end of the screw have, more often, cutting marks ( this show that this screws was made from long brass threaded rod and cut with cutting pliers)
Here are, to illustrate, some examples of original screws with ,every time, for comparison, one screw with modern ISO thread and equivalent diameter.
1 - Screw of wappen M42, M60 and M71
2 - Screw of the rear spine M42, M60, M71
3 - Screws for M95 " eigetumstück " or Extra Helm
4 - Screws for hessian M95 helmet
5 - Screw of the rear spine M95
6 - Screw of the rear spine M15