Standard Shaft Collars are made in non-magnetic 303 stainless steel. These stainless steel shaft collars have precision bores held to +.0005” tolerance. Inch and metric bores are available from 5/64” to 16mm. Standard Collars are supplied with one set screw and a spot or pre-drill at 90 degrees from the screw. Use the pre-drill to drill through the collar and shaft to install a dowel or spring pin.