PLEASE ENTER
YOUR
MODEL NUMBER HERE:
Don't know your model number?
Let us give you a helping hand

Free Delivery Over £60

Over 200,000 Parts Stocked

Over 40 Years Experience

Expert Advice
Due to upcoming changes in EU import regulations from 1st July 2026, we have temporarily paused deliveries to EU countries.
We are working to restore this service as quickly as possible and thank you for your patience.
DeWalt 584421-00 is the part number for a piston and ram assembly used as a spare part in several of DeWalt's rotary hammer models. It is a replacement part for tools such as the D25303K, D25304K, D25101K, D25102K D25203K & BERNER BHD-3
PRODUCTS THAT USE THIS PART