This is an original replacement part manufactured for use with Hitachi drill drivers. The special self-tapping screw is commonly used to fasten the two halves of the motor housing. This screw is used with several different models and can have multiple applications. The screw is sold individually, please see model diagram for associative parts.
This is a special component which helps to provide a tight fit between connected parts. Over time it may wear out, get damaged or lost eventually requiring a replacement. Check the appropriate diagrams for your model to ensure the proper repair procedure. This high-quality spring washer is made of durable material and is sold in a pack of ten. It is a genuine OEM sourced product that is made for Hitachi power tools.