From Hirschmann, this GDSN cable socket valve connector has a central screw of M 2.5 x 27. Conforming to the DIN EN 175 301-803-C standard, this type C connector has a high degree of environmental protection when sealed.
Type C Construction
PG7 Cable Gland
Central Screw Mounting
IP 65 Protection Class
Contact Resistance of <= 4 mΩ