EMCA’s C4 Series Protective Caps are designed to provide robust environmental and mechanical protection for unmated MIL-DTL-38999 Series I circular connectors. These caps safeguard exposed mating faces during equipment downtime, handling, storage or transport—protecting the connector’s insulator, contacts and coupling surfaces from dust, moisture, debris and accidental impact.
Engineered around the Series I bayonet-coupling interface, C4 caps ensure a precise and secure fit for both plug and receptacle connectors. Installation is fast and tool-free thanks to purpose-designed internal retention features that allow quick engagement and removal in field or workshop environments.
Manufactured from high-quality materials and available with corrosion-resistant plating options, the C4 Series is built for long-term durability in aerospace, defence, industrial and transportation applications. By maintaining the cleanliness and integrity of 38999 Series I connectors, these caps support reliable system performance and reduce maintenance demands across demanding operational conditions.
