Expanding Adaptor Round for bolt hole mount castors
To attach single bolt hole castors to round or square tube
Adaptors have an expansion range of 2.0mm to 2.5mm and are recommended for tubes with a 1.6 wall or greater. Adaptors and Pintle bolts can be purchased separately or assembled into bolt hole style castors. It is recommended that adaptors are rechecked for tightness up to four weeks after initial installation.