Original DeWalt ring — part no. 1004691-28 — a small retaining / locking ring used in the front / spindle assembly of SDS‑plus rotary hammers to secure the cap / collar and internal spindle components during operation.

Fits Stanley/Black & Decker / DeWalt SDS‑plus hammer assemblies (examples shown in parts diagrams: Stanley FME1250 and Black & Decker KD1250K / KFFMED1250), so check your tool’s parts diagram for 1004691-28 to confirm fit. This original DeWalt part is the same ring listed across the group’s parts lists and is a common item in DeWalt spare parts.

Simple to install during reassembly — the ring seats into its groove behind the cap / collar and holds the spindle / clutch stack in place. If your breakdown shows this part number, this genuine DeWalt ring restores correct retention and alignment in the hammer’s front end.