Kilopascal wrote in USMA 10466: >The inkwell is back together. I have no way of measuring the pitch other >than to try to screw it into a known nut. As I noted, the diameter is >"close to" M4. The screw will thread about 2 turns into an M4 x 0.7 mm nut >before binding. This tells me it is either an M4 screw with a thread pitch >other than 0.7 mm as is the standard now, or if it is an imperial screw, >like #8-36, if there ever was such a size. I was asking to anyone who might >know what fastener standards might have been in use in France in 1944 or >before. Also, the screw is 11 mm long, which is not a standard metric >length in today's screws. In FFU, this could be a 7/16 inch long screw. >I'm not sure if 7/16 is or ever was a standard length. The length of the screw is irrevelant What we need to know is the pitch of the thread. Measure the whole length of the thread and divide that langth by the number of threads. That will give you the pitch. There is also a metric thread of 4 mm diameter and pitch of 0.75 mm.
