Sealey Glow Plug Thread Repair Replacement Inserts

The VS311.04 replacement inserts feature M12 thread size with 1.25mm pitch, making them suitable for larger diesel engines and heavy-duty applications. These inserts are specifically designed for use with the Sealey Model No. VS311 thread repair kit, providing professional thread restoration for vehicles requiring M12 x 1.25mm glow plug thread specifications. Supplied in a pack of 5, these larger inserts are essential for workshops servicing commercial vehicles, agricultural machinery, and larger displacement diesel engines. The M12 size provides increased thread engagement area, whilst the 1.25mm pitch delivers robust holding power for secure glow plug installation in demanding applications.