This bimetal type of thermostat controls temperature up to 400°C. Disk type of thermostat has a refractory problem and can not control higher temperature than 230°C.  It is economical against an electronic thermostat employing a thermocouple. Cross bar contact type of H702P is available. (1~100mA) UL approved, dust proof (IP60) and offers a mounting bracket is selectable from bracket 1 and 2.

H702 High Temperature Bimetal Thermostat PDF