The MS3106F28-21S is a MIL-DTL 5015 Series I straight plug circular connector designed for reliable performance in demanding environments. It is configured with 37 size 16 solder cup socket contacts with hard silver plating, housed within a size 28 aluminum alloy shell with an olive drab chromate coating over cadmium. This connector supports a contact rating of 22 A and maintains a low contact resistance of 6 mΩ. Engineered for durability, it operates across an ambient temperature range of -55°C to +125°C, withstands 500 hours of salt spray, and is rated IP65 for environmental protection. These robust features make it ideal for various military, industrial, and aerospace applications where secure and resilient connectivity is critical.