B757-300
Communication Breakdown
Deviation / Discrepancy - Procedural Hazardous Material Violation; Deviation / Discrepancy - Procedural Published Material / Policy
General None Reported / Taken
Human Factors
I shipped multiple tools COMAT on international airway bill # XXX-ZZZ XXXXXXXX. Contained in this batch of tooling was a Tire Gauge - PC 91XXXXX. This Item is Hazmat because it has a battery in the unit. I did not realize this tool was Hazmat because the planners gave me the item to ship with a [system] screenshot (Which does not show if the item is Hazmat or not); therefore I packed the tool and signed the Airway bill declaring that no Hazmat was contained in the shipment; when if fact there was. I discovered this issue this morning when I reported to work and had an email for the ZZZ1 Storekeeper letting me know that 1 of the items in the shipment was Hazmat.Believe the [screenshot] should have a Hazmat indicator to show if a tool is Hazmat or not. Other [systems]; such as the [other program] already show this as well as multiple ETIPS screens.
Maintenance Storekeeper reported shipping Hazmat COMAT Lithium Ion battery power tool without required Hazmat label.