980-8558-001 is a sealing ring for use on the barrel of CA Bayonet plugs, providing interfacial sealing to protect connector contacts from environmental contamination. This component is specifically designed for shell size 28 connectors and features an outer diameter (d9) of 34.0 mm. The sealing ring is manufactured from elastomeric material with a thickness of 1.8 ± 0.2 mm and an inner diameter of 3 ± 0.2 mm, ensuring reliable sealing performance. These rings are commonly used in aerospace, defense, and industrial applications where connectors must maintain integrity in harsh environments and prevent ingress of moisture, dust, and contaminants.