This is a genuine OEM replacement part, it is sold individually. This part is used to keep the brush tight against the armature so the tool will work properly. Over time when the brushes wear down and heat is created, the spring may lose its tension and will have to be replaced.
Genuine Dewalt replacement part, this item is sold individually. The 696631-00 Steel Ball is part of the chuck assembly of the Impact Drivers shown below. When you pull back the sleeve of the chuck assembly and insert your bit, the Steel Ball is the part that locks the bit in the chuck assembly. In the Screw Drivers listed below this is the part that secures the Bit Holder in the spindle.
Genuine OEM replacement part, this item is sold individually. This screw is used in various places in all of the tools listed below The most common use for this screw is to secure plastic housings together. It has a Torx T-20 head.