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

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

These bulbs are sized to fit tight spaces such as signs, control panels, indicators, and flashlights.

These miniature bulbs are sized to fit older telephone switchboards, signs, instruments, and indicators.

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

Commonly used in signs, instruments, indicators, and flashlights.

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