A pin header (or simply header) is a form of electrical connector. It consists of one or more rows of male pins typically spaced 2.54 millimetres (0.1 in) apart, but sometimes 2 millimetres (0.079 in) or 1.27 millimetres (0.05 in) is used as well.The distance between pins is commonly referred as pitch in the electronic community.

 
Pin headers are often associated with ribbon cable connectors, pin headers often also function as recipients for jumpers. The most common jumper spacing is 0.1 inches (2.54 mm) spacing, though 2 millimetres (0.079 in) is sometimes used in smaller products.

 
Pin header connectors are thus "male" connectors (female counterparts do exist, but these are normally just called "header connectors", without "pin") and are mostly used inside equipment, rather than being used as a connector on the outside of the device.

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