Pins on either side of the base lock these bulbs into sockets. Pins are directly across from each other.

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

Fit these bulbs in tight spaces such as signs, control panels, indicators, and flashlights.

Use these bulbs in tight spaces, such as in indicators and vehicle lights.

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