Is this an SMC connector?
I'll add this as a new answer.
 Mark &amp; Chris are correct - it is NOT a SSMA connector.
This answer is based on an extension of what they discovered 
The cable designed for use with the accelerometer is shown here  

PCB Piezotronics -
Model: 030A10 Miniature, low-noise, blue coaxial cable, 10-ft, 3-56 plug to 10-32 plug



If you want the "EK" connector only it is here (as Chris advised): EK connector - 

Coupling Thread 3-56 female
    Size - OD   0.12 in  / 3.0 mm
    Size - Length   0.29 in  / 7.4 mm



With the above information an excessively enthused technician could construct a workable plug

OR ...

PCB Piezotronics contact page: