Connecting bo has indication mark in bolt head and indication symbol at free end of bolt shaft, with planes through rotation axis and mark and symbol respectively at fixed angle

摘要

The connecting bolt (1) has a bolt head (2) and a threaded bolt shaft (5). At least one indication mark (9) is arranged at the bolt head and at least one indication symbol is arranged at the free end of the bolt shaft. A plane ( alpha ) through the indication mark and the rotation axis (q) of the bolt forms a defined angle ( eta H) with a plane ( psi ) through the indication symbol and the rotation axis of the bolt.