https://www.coxhardware.com/c-2936-weld-nuts.aspx weekly 0.7 https://www.coxhardware.com/p-26244-round-projection-weld-nuts-sizes.aspxdaily0.9 https://www.coxhardware.com/p-26245-slab-weld-nuts-sizes.aspxdaily0.9 https://www.coxhardware.com/p-26243-round-weld-nut-sizes.aspxdaily0.9