38 spaced from fixture 31 apparatus 30 further includes a crimper unit 50 including a crimping ram 52 driven by a solenoid unit e crimp shift pin 54 is shown in its rest position biased away from the cylinder shell 11 by crimp pin spring 55 in operation lock 10 including shell 11 plug 13 plug tail 12 and key 16 as an assembly is placed in aperture 32 of fixture 31 shear pin 41 is hit by shearing plunger 36 to apply force f to cylinder plug tail 12 to move plug 13 in direction y pins 15a e are thereby sheared fig3 plug 13 is pushed back by hand using key 16 to the original position next crimper unit 50 drives crimp shift pin 54 to crimp ring portion segment 20p of shell 11 against plug portion 13a see fig1 and 7 turning to fig8 a 9 and 9a a further embodiment of the invention is shown in which pins have a certain notch configuration and the plug is shaped to facilitate shearing and rotation each pin 60 of this embodiment has grooves or notches 61 for example the ten 10 circumferential grooves 61a j shown in fig8 each groove 61 has beveled surface areas or chamfers 63 to facilitate plug rotation and to make.