The 121141-0120 is a metal protecting dust cap with terminal link and chain assembly for CA bayonet connectors manufactured by ITT Cannon. This protective component features a durable metal construction with a rivet-secured chain attachment, designed to maintain connector integrity during non-operational periods. The cap accommodates various shell sizes and includes dimensional specifications with a maximum outer diameter (d1) of 20.7 mm, inner diameter (d2) of 4.3 mm, and a terminal link cord length (l1) of 100 mm ±10 mm. The assembly is commonly used in aerospace, defense, medical, and industrial applications where connector protection and reliability are critical, ensuring that connector contacts remain clean and undamaged until deployment.