Split type nut and connector box

The utility model discloses a split-type nut and a connector box, which belong to the technical field of optical cable connector boxes, and comprise a first part and a second part, and an arc-shaped notch of the first part and an arc-shaped notch of the second part are configured to be capable of encircling to form a penetrating through hole. The first part and the second part form two opposite end faces at the joint of the arc-shaped notches, a guide strip is arranged on one end face of the first part, a guide groove is formed in at least one end face of the second part, and a limiting structure is arranged on one side, in the extending direction of the notches, of the guide groove. According to the split type screw cap, the penetrating through hole of the screw cap can be opened and closed, so that the split type screw cap can be directly arranged on the periphery of an optical cable in a surrounding and sleeving mode, the split type screw cap not only has a good sealing effect, but also can be disassembled