Pin headers with a plastic guide box around them are known as "box headers" or "shrouded headers" and are normally only used in combination with a ribbon cable connector. A notch (key) in the guide box normally prevents placing the connector (polarised by a "bump" on one side) the wrong way around.

Cixi Lanling Electronic CO.,LTD is a professional manufacture of electronic connector and terminal blocks.

Electric Connectors include:

Pin Header Connector,Female Header Connector,Box Header Connector,IC Socket,

Shrouded Header Connector,IDC Socket Connector,Dip Plug Connector,

Micro Match Connector(Red IDC Socket) ,Ribbon Grey Flat Cable,Edge Card Connector,

Zif Socket Connector,Sip IC Socket(Machine Pin Series) ,Dip Strip Adapter,

DIN41612 Eurocard Connector,Mini Jumper Connector,D-Sub Connector,

D-Sub Metal&Plastic Hoods,Dip Switch,PLCC Socket,Scsi Connector,

Circular Micro Jack Connector,Waterproof Connector,Breadboard, Pcb Jack Etc

Terminal blocks include:

Pcb Screw Terminal block,  Pluggable Terminal Block,  Pcb Spring Terminal Block,

Barrier Terminal Block, Feed Through Terminal Block, Wago Terminal Block Connector