Clip for bulb photos

Recently i have made barn door tracker, but it requires long exposure (more than 30 sec).So bulb is best thing i came for.I didnt want to buy remote for camera because it will come at october in my country( Russia) , and its useless all day long for me cause i need it only at night. Fits perfectly on fuji xm 1 and on over small no mirror cameras.(Do not fit xt10 xt 20)and any mirror cameras).If you need one for your size camera i can make one.
Requires 5 mm screw (0.19 in)