Makita HOLDER JOINT B DCG180 - 318958-2

312D41-1 supersedes older part numbers: 318958-2

Makita 312D41-1 — Holder Joint B (replacement retaining ring)

A genuine Makita replacement part that secures the barrel/holder assembly on Makita caulking/dispensing guns; listed as "HOLDER JOINT B" under part number 312D41-1.

This compact ring clamps the Holder B assembly and is used where the tool accepts 600 ml sausage-style cartridges (600 ml).

Compatible models include Makita cordless caulking guns such as CG100D (12V max), DCG140 and DCG180 (18V series) and BCG180 — check your tool’s parts diagram for exact fit.

Note: this part replaces an earlier Holder Joint (older type 318958-2 → new 312D41-1), so it’s worth confirming the Holder B version on your tool before fitting.

Housed as a single, easy-to-install ring, it’s a direct, original Makita component that restores proper barrel retention and smooth dispensing action. Makita parts like this are ideal when you need a concise repair. This item is a straightforward example of common power tool parts used to keep your caulking gun working as intended.

Jump straight to the Makita spare parts diagrams:

• Makita BCG180 Parts
• Makita CG100D Parts
• Makita DCG140 Parts
• Makita DCG180 Parts

Browse our full range of Makita caulking gun parts.