Up to now, only contacts with a crimp connection for pin assignments 12, 16 and 17 were offered with the M23 signal connectors of the RF series. Now, there are also 6 to 17 position solder insulating bodies available for the RF series after adapting the RC insulating bodies to the RF series using additional spacer sleeves. Also, now most crimping insulating bodies from the RC series can be built into the circular connectors of the RF series. This is also especially true for the 12-position crimping insulating body with Ø 1 mm D-sub contacts.