Pins on either side of the base lock these bulbs into sockets.

Offset pins on the base lock these bulbs into sockets. One pin is slightly higher on the base than the other pin.

These bulbs are sized to fit tight spaces such as indicators and vehicle lights.

Wire terminals allow you to connect these bulbs to a power source through a panel.

Pins on the base lock these bulbs into sockets to withstand vibration. They're often used in machines and elevators.