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.
Hitachi 877852 — Head cap and gasket set designed to restore the sealed firing chamber on Hitachi coil framing nailers. The metal head cap plus the matching gasket(s)/seals replace the worn sealing surface that sits between the exhaust valve and the O‑ring to stop air leaks and restore consistent drive.
Fits Hitachi framing/coiled nailer models such as NV65AC / NV75A / NV83A and NV83A2
Made to factory specification (manufactured for Hitachi by Metabo HPT / HiKoki), the set is installed using basic hand tools — the assembly uses M6 hex bolts (examples shown as M6×25 and M6×45 in the parts list), so an M6 hex socket or wrench plus a small allen and pliers are typically all that’s needed.
Simple, direct replacement to stop air leaks and get a tired nailer driving like new again — genuine Hitachi fit and function for the models above.
