RAMPA
These German made, Metric, plated steel bolts (more accuratly set screws) are available in 30 variants with the KF range having a flattened heads and the KT range having a domed mushroom head.
M6 versions have a 15mm diameter head with a 4mm hex key drive. M8 versions have a 17mm Head diameter head and an M5 hex key drive..All heads are 3mm in height.
The length refers to the length of the threaded barrel. Available as noted in either plain or black zinc.