Bayonet Cap Fitting Sizes

The number refers to the diameter of the base e g ba22 is a 22 mm diameter bayonet cap lamp.

Bayonet cap fitting sizes.

Edison screw es is a standard lightbulb socket for electric light bulbs. They are used in a variety of lighting around the home and one of the most common types of fittings. The standard size for bayonet caps has a smooth metallic base and is 22mm in diameter with two moveable pins on either side but bayonet caps are available in a range of large and small sizes. This cap is the standard 27mm diameter screw cap for uk 240v light bulbs not to be confused with e26 which is a 26mm size and is designed for the 120v us market.

For bulbs powered by ac current the thread is generally connected to neutral and the. Bayonet bases or caps are often abbreviated to ba often with a number after. Bayonet cap bulbs use a twist and lock action to secure into the fitting. The most popular es or e27 fitting is 27mm diameter and is widely used in uk and europe.

See our range of es e27 capped lamps here. A range bc light bulbs also known as b22 and bayonet cap available in various sizes colour temperatures styles lumens and technologies from trusted trade brands. Gu10 fittings are distinctive by their twist and lock fitting action and are common in domestic applications. It follows that the larger the cap the great the wattage and heat the lamp can withstand.

Suitable for commercial and residential applications they are often used in ceiling fittings in the home. If your fittings are empty. The most common code is for bayonet caps is b22. Therefore gu4 and gu5 3 fittings are commonly found on low voltage wattage lamps and often have a push fit action.

Most standard light fittings will take either 27 screw cap edison bulbs e27 or 22 inch bayonet cap bulbs b22d. Gu10 the letter g indicates a bi pin or two pin base but because gu10s have a twist and lock mechanism they are classified as a type of bayonet. The bulbs have right hand threaded metal bases caps which screw into matching threaded sockets lamp holders. The lower case letter s or d specifies whether the bulb has single or double contacts.