Used HRT volumes, some of them are screwed on (marked as such). Others require long, flat head bolts. Please note that each bolt needs to be as long as the bolt column plus at least an inch to make correct contact with the T-nut.
You can choose to buy USED bolts from us, select from drop down menu (Bolts are to be purchased with our HRT volumes only)
One of the best sources for bolts in Toronto is https://brafasco.com/