Bundle clamp, hot-dip galvanized according to DIN EN ISO 1461, for C-profile rails with 16-17 mm slot width, when used on systems with anchor rail 2986 such as risers, order GMZ... sliding nut separately, including galvanized countersunk head screw M 8 x 12, galvanized sliding nut GSM 408 and zinc-nickel coated pin screw M 8. Clear width B: 50 mm Clamping range: 20 - 40 mm