As the name implies, this type of #bolt #hole #caster uses one bolt or stud protruding from the bracket attached directly to the equipment. 🛞
https://www.gorge.net.au/bolt-....hole-vs-plate-castor

Bolt-hole vs. Plate Castors: Which One Should You Use? - What Do
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Bolt-hole vs. Plate Castors: Which One Should You Use? - What Do

Castors are essential parts of material handling equipment. They’re assemblies of wheels and mounting hardware that attach to the bottom of trolleys, carts, dollies, hand trucks, scissor lifts and more. Their basic role is to support the weight