It uses a 0.100" (2.54 mm) pitch — the standard grid for breadboard and prototyping layouts — and terminates through-hole at a right angle, which places the pin row parallel to the board surface for edge-mount or low-profile mezzanine connections. The tin-plated phosphor bronze contacts are rated 5 A per circuit at 110 V, and the black UL94 V-0 housing handles the flame-rating requirement for equipment inside an enclosure.
The 0.100" pitch is the de facto standard for 0.1-inch header strips — this part drops into a PCB footprint that matches any standard 0.1-inch female socket or IDC connector.