Scaffold/Speedrail on wheel connection bolt (42 – 51 mm)

This adapter clamps to scaffold/speedrail tubes ranging from 41 – 51 mm outside diameter. It works for all common tube sizes (i.e. 1-1/4" speedrail, standard scaffold (1-1/2" / 48.3 mm). 
The base of the adapter has a 3/8" threaded hole, which accepts the Grip Kit wheel connector bolt (AL-1535) for mounting track and skateboard wheels. The wheel connector bolt (AL-1535) is connected by using a 3/8" to M10 adapter screw.