The glass envelope has a tubular shape, with the lament stretched between
brass caps cemented to the tube ends. This bulb was commonly used for
number-plate and interior roof lighting.
Miniature centre contact (MCC)
This bulb has a bayonet cap consisting of two locating pins projecting from
either side of the cylindrical cap. The diameter of the cap is about 9 mm. It has
a single central contact (SCC), with the metal cap body forming the second
contact, often the earth connection. It is made with various power ratings
ranging from 1 to 5 W.
Capless bulb
These bulbs have a semi-tubular glass envelope with a attened end, which ...
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