Reddit mentions of Hilitchi 360pcs M2 M3 M4 Male Female Brass Spacer Standoff Screw Nut Assortment Kit

Most electronics if imperial use 4-40. Aka #4 diameter 40 threads per inch.
If you are a metric guy M2 M3 M4 are 2mm, 3mm and 4mm respectively. Here is a stand off kit that has a lot of size screws stand offs and nuts for metric since you are canadian. Hilitchi 360pcs M2 M3 M4 Male Female Brass Spacer Standoff Screw Nut Assortment Kit https://www.amazon.com/dp/B013ZWM1F6/ref=cm_sw_r_cp_apa_zDjyxbVD15PA6

I have not but read the comments ppl have tested it to 20A. You'd need like 4pcs per battery from this 360 pack:
https://www.amazon.com/dp/B013ZWM1F6/ref=cm_sw_r_cp_apa_i_tmEBDbXT875G8

Sorry I can’t check my build immediately for exactly which standoffs I used; but here is the link to the set I bought on Amazon: https://www.amazon.com/dp/B013ZWM1F6/ref=cm_sw_r_cp_api_i_Ux7sDbQAW6TGZ

I’ll try to check tomorrow and see if I can be more exact!

You can. It would be more affordable going that route. Rather than getting a kit online which you will probably never need to use the whole kit in the long run. https://www.amazon.com/Hilitchi-360pcs-Female-Standoff-Assortment/dp/B013ZWM1F6/ref=mp_s_a_1_4?keywords=pc+standoffs&qid=1565024872&s=gateway&sr=8-4

>Sorry I can’t check my build immediately for exactly which standoffs I used; but here is the link to the set I bought on Amazon: https://www.amazon.com/dp/B013ZWM1F6/ref=cm\_sw\_r\_cp\_api\_i\_Ux7sDbQAW6TGZ
>
>I’ll try to check tomorrow and see if I can be more exact!

Tks !!