This International Standard specifies the requirements for Grade TH fine-tolerance hoist chains, for use as load chains in manually operated chain hoists and consisting of round steel short link chains, electrically welded and heat treated, tested to and compliant with the ISO 1834 general conditions of acceptance. NOTE Butt welding and flash butt welding are defined in ISO 4063. The range of nominal sizes of hoist chains covered by this International Standard is from 3 mm to 13 mm. They are for use in the temperature range −10 °C to 200 °C.