Genuine Manufacturer Sourced replacement part used on a variety of Makita Power Tools. This is a Metal Pan-Head Screw and it is sold individually. This screws is commonly used to hold two pieces of Housing Set together.

Genuine Makita replacement part, this item is sold individually.
This Retaining Ring is used in a number of Makita Tools as shown below.
Retaining rings are used in various parts of tools.
They are usually installed on a shaft to keep a bearing or a gear from moving.
They are also used in other applications depending on what tool you are working on.
This is an example of an external retaining ring.

This cord is a genuine Makita replacement part and is sold individually. It is constructed with tough, thick outer rubber insulation for a long service life. Over time, power tool cords will wear out or become frayed. We recommend replacing a cord as soon as signs of wear are visible.
Power Cord Specifications:

This is a genuine manufacturer sourced replacement part designed for use with Makita power tools. It is a standard hardware which has multiple applications based on your tool. Please refer to diagram to ensure correct application. This pan-head screw is made out of metal and it is sold individually. Requires a phillips screwdriver to install or remove this screw.

This is a genuine Makita replacement part, it is sold individually.
The purpose of this filter is to keep dirt and other small particles from entering the carburetor and engine and causing internal engine damage.

Once this type of filter gets clogged or dirty it should be changed (Not Cleaned). This is to prevent restricted air flow and foreign matter from entering the engine.
It is a good practice to keep an extra Air Filter on hand.

This is a genuine OEM approved replacement spark plug. It is commonly used with Makita power tools. The purpose of a spark plug is to deliver electric current from an ignition system to the combustion chamber. Over time spark plugs will wear out requiring replacement. Please note, this item is sold individually.

You would need a spark plug wrench or a socket wrench to install the spark plug.