End coupling for a rock bolt

An end coupling for a rock bolt having a shaft having an external thread, the coupling having an axis and the coupling comprising:

• a body having a leading end and a trailing end spaced apart along the axis,
• a first passage portion extending along the axis from the leading end;
• a second passage portion extending along the axis from the trailing end;
• the first passage portion defined in the body and including a first thread portion to threadingly engage the external thread on the shaft of the rock bolt;
• the second passage portion defined in the body and including a drive receiving portion arranged to be engaged with a drive inserted into the second passage portion via the trailing end to impart rotation to the coupling about the axis,
• wherein the second passage portion includes a second thread portion arranged to receive an attachment with a complementary thread received in the trailing end to threadingly engage the attachment to the end coupling, and
• wherein the drive receiving portion is defined inside of the body between the first thread portion and the second thread portion.