MS3116F18-11S is a straight plug connector conforming to MIL-DTL-26482 Series I specifications, featuring an 18-contact shell size with an environmental endbell (F-type) and solder contacts. The connector utilizes an aluminum alloy shell and hardware construction, providing a rugged, lightweight design suitable for high-density contact arrangements with quick-disconnect bayonet coupling for rapid mating and unmatting. Key dimensional specifications include a thread size of 11875-18 UNF, an overall length (L1) of 1.553 inches (39.4 mm), and a maximum flange diameter (KK) of 1.178 inches (29.8 mm). This connector is intermateable, intermountable, and interchangeable with all MIL-DTL-26482 connectors, making it ideal for power generators, industrial machinery, telecommunications, sensors, and mobile equipment applications requiring reliable environmental sealing and robust performance.