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 small, but very bright, so they're often used in flashlights and optical instruments such as projectors and microscopes.

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

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

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