Inserts for Bolt-Hole Castors

These extenders can be fitted to any single bolt-hole castor. Use for round or square tubing on all types of trolley. All the extenders have a 10 mm bolt. The 50 mm and 75 mm Ø bolt-hole castors above have a 10 mm threaded hole and will fit perfectly. Meanwhile, the 100 mm Ø bolt-hole castors above have a 12 mm threaded hole and the 12 mm extender will come as a kit with a reducer washer to ensure a snug fit.