Safety clamps of the MS series are fastened to the slot nut with a hexagon screw. They engage both a slot in the nut and in the clamping sleeve or shaft.
The fastening screw has a self-locking thread up to M16; from M20 onwards, a standardized hexagon screw with locking element is used.
Safety clamps are used with slot nuts of the HM30 and HM31 series.