Connector

A connector comprising a shell block and a contact assembly, wherein:

• the shell block has a through hole and a receiving portion;
• the through hole pierces the shell block in a front-rear direction and has a large aperture portion and a small aperture portion;
• the large aperture portion is located forward of the small aperture portion in the front-rear direction and communicates with the small aperture portion;
• the large aperture portion is larger than the smaller aperture portion in a plane perpendicular to the front-rear direction;
• the through hole has a first size as a size of a shortest part of the small aperture portion in an up-down direction perpendicular to the front-rear direction;
• the receiving portion is provided on a boundary between the large aperture portion and the small aperture portion in the through hole and faces forward in the front-rear direction;
• the contact assembly comprises at least one contact and an insulator member which fixes and holds the contact;
• the insulator member has a held portion projecting in directions perpendicular to the front-rear direction;
• the contact assembly is divided by the held portion into a front portion located forward of the held portion and a rear portion located rearward of the held portion;
• the held portion is brought into contact with the receiving portion in the through hole;
• the contact assembly has a second size as a size of a tallest part of the rear portion in the up-down direction;
• and
• the second size is smaller than the first size.