Patent ID: 7394964

Claim:
A dust plug assembly for a hardened fiber optic connector, the assembly comprising: a threaded cap including a first end and a second opposite end and a threaded portion between the first and second ends, the first end shaped to provide a gripping surface for rotating the threaded cap; a keyed insert rotatably mounted to the threaded cap adjacent the second end of the threaded cap, the insert including a first end mounted to the threaded cap and a second end defining a mating end for insertion into the hardened fiber optic connector, the mating end of the keyed insert including a pair of tabs extending from the second end; the mating end of the keyed insert further including a generally cylindrical cross-section defining an axis, with a recessed flat parallel to the axis on a first side extending along an outer surface of one of the tabs across the second end of the insert toward the first end of the insert, and a rounded surface opposite the flat extending along an outer surface of the other tab across the second end of the insert toward the first end of the insert, the flat positioned closer to the axis than the rounded surface.