346357-8 supersedes older part numbers: 346006-7
Makita 346357-8 — Under Driver Guide (original Makita replacement). Precision-formed as the lower guide that supports and locates the driver/driver-plate assembly in the GN900 series framing nailers, this part restores proper nail alignment and reliable firing when the original guide is worn, bent or cracked.
Fits Makita GN900, GN900S and GN900SE (this is the Type‑2 replacement under‑driver guide that supersedes the earlier 346006‑7 configuration). It installs into the existing driver/plate assembly and mates with the nail plate and pusher as shown in the GN900 parts breakdown.
You’re getting an original Makita under‑driver guide designed to match the tool’s factory fit and service pattern — a direct swap that returns correct driver travel and nail seating so the tool runs smoothly again. This is one of the common Makita spare parts you’ll want when the lower guide shows play or damage.
Jump straight to the Makita spare parts diagrams:
