Fastening aid, fastening system, connector and method for fastening a fastener

1. A fastening aid for screwing a fastener having a locknut by rotating the fastener around a rotation axis with a predetermined torque, the fastening aid comprising:

a sleeve element configured to be attached around the locknut along the rotation axis;

an engaging structure provided at an inner surface of the sleeve element and configured to engage with the locknut when the sleeve element is attached around the locknut, the engaging structure comprising a first rib element and at least a second rib element extending at the inner surface of the sleeve element along and toward the rotational axis; and

a clasp element for reversibly closing the sleeve element to a closed state for attaching the sleeve element around the locknut, and for reversibly opening the sleeve element to an opened state for detaching the sleeve element from the locknut, the clasp element being configured to provide the first rib element,

wherein the fastening aid is configured to allow screwing of the fastener around the rotation axis when exposed to a torque smaller than or equal to the predetermined torque and to prevent screwing of the fastener around the rotation axis when the predetermined torque is exceeded.

2. The fastening aid according to claim 1 , wherein the fastening aid is configured to prevent screwing of the fastener by the engaging structure being configured to allow an essential relative rotational movement between the fastening aid and the fastener when the predetermined torque is exceeded.

3. The fastening aid according to claim 1 , wherein the engaging structure is configured to engage with an external structure of the locknut, and

wherein the fastening aid is configured to prevent screwing of the fastener by the engaging structure being configured to slip over the external structure of the locknut when the predetermined torque is exceeded.

4. The fastening aid according to claim 1 , wherein at least the sleeve element and/or the engaging structure exhibit elastic mechanical properties allowing the engaging structure to slip over the external structure of the locknut when the predetermined torque is exceeded.

5. The fastening aid according to claim 1 , wherein the engaging structure further comprises third, fourth, fifth, and sixth rib elements and is adapted to engage with an external structure of the locknut having a hexagonal shape.

6. The fastening aid according to claim 1 , wherein the clasp element comprises a hook and an eye, which are engageable for reversibly closing the sleeve element and reversibly releasable for opening the sleeve element.

7. The fastening aid according to claim 1 , further comprising a gripping structure at an outer surface of the sleeve element for exposing a torque to the fastening aid and optionally to the fastener.

8. A fastening system, comprising:

the fastener; and

the fastening aid according to claim 1 attached thereto.

9. A connector, comprising:

the fastener; and

the fastening aid according to claim 1 for connecting the connector with a counter part by screwing the fastener at the predetermined torque.

10. A connector system, comprising:

at least one connector according to claim 9 ; and

a cable attached to the at least one connector.

11. A method for fastening the fastener to a counter part,

the method comprising:

rotating the fastener around the rotation axis by the fastening aid according to claim 1 attached thereto until the predetermined torque is exceeded; and

opening the sleeve element by disengaging the clasp element and removing the fastening aid from the fastener connected to the counter part.

12. The according to claim 11 , further comprising arranging the fastening aid to the fastener such that the sleeve element is arranged around the locknut of the fastener and closing the clasp element to attach the sleeve element around the locknut.