We are currently experiencing substantial delays with Hitachi/HiKOKI and Metabo spare parts due to the two brands merging warehouse. At this moment in time we are unable to provide confirmed delivery dates on out of stock parts, for any urgent requirements please contact us prior to ordering.
Original Hitachi part 313396 — O‑ring (C), a small but critical sealing ring for rotary hammers and demolition hammers. This genuine Hitachi rubber O‑ring fits into the retainer/sleeve groove to seal and cushion the hammer assembly during operation.
Dimensions: 20 × 26 × 3 mm (inner Ø × outer Ø × thickness), made from a flexible sealing compound suited for impact/hydraulic service in hammer tools. It’s the exact replacement shape used in the hammer/retainer area and installs by seating into the corresponding groove.
Typical models this part is used on (examples): Hitachi/Hikoki DH40MRY, DH40MA, DH40MB, DH40MR, DH38MS, DH38SS, H41MB2 and similar rotary/demolition hammers where the parts diagram lists 313396.
