PT02SE-12-3S is a box mounting receptacle connector designed for applications requiring crimp contact termination and bayonet coupling. This connector features a shell size 12 with an open wire seal configuration, meeting MIL-C-26482 Series 1 specifications. The receptacle has a front view dimension R of 0.812 inches and S Max. of 1.266 inches, with a contact diameter T of 0.120 inches (±0.005). The connector provides a maximum length L of 1.266 inches and a mounting hole diameter N of 0.813 inches, with a side view dimension K of ±0.062 inches and M of +0.10/-0.000 inches. This connector is commonly used in aerospace, military, and industrial applications where reliable, compact interconnections with environmental sealing are required.