I have a FRZ Bomblet with fuze, not the best of fuzes but a very good adaptor. I am trying to find the thread size and pitch of the fuze itself, unfortuantly the male thread is shot and difficult to measure . I thought it was 20mm x 1 but upon recieving a new die it turns out to be around 21mm, not sure if the pitch is slightly smaller, i worked out that the tpi on the adaptor as being 25 tpi not sure if this is the same a the metric pitch of 1mm. Any engineers collectors out there with a vernier and thread gauge and better example of a FRZ bomblet fuze.