The Toyotomi Screw 1X, part number 20478188, is a genuine replacement fastener used in the heat exchanger joint bracket area of select Toyotomi Toyostove Laser vented heaters. It secures the heat exchanger bracket and related components to help maintain proper alignment and mechanical integrity within the heater. This screw is manufactured to the original specification so it fits in the correct location as shown in the model parts diagrams without modification.
This replacement screw is used during service or repair when the original fastener is worn, stripped, missing, or otherwise compromised. It restores correct fastening at the heat exchanger joint bracket to help ensure stable operation and alignment of internal components. Proper installation follows the heater manufacturer’s parts diagram and service instructions to ensure the screw is placed in the intended location and tightened to the appropriate torque.
What’s Included: One (1) Toyotomi Screw 1X (heat exchanger joint bracket fastener).
Installation Limits: Intended for use only on compatible Toyotomi Toyostove Laser models; installation should be performed with the appliance powered off and cooled, following the manufacturer’s service documentation.
Compatibility: Toyotomi Toyostove Laser 73 and 73AT, Laser 730 All Models
Laser 73 and 73AT, Screw 1X is located next to Heat Exchanger.
Laser 730 All Models, Screw 1X is located next to Heat Exchanger.
