Counterbore Plug, (Ød2)3.4mm to (Ød1)5.1mm, Silicone (Green), Pack of 500, HDCS51-B
SGD $414.00
Solid and durable, every plug fits a range of hole diameters. Use them for threaded holes or holes before dowel pin installation. The counterbore ensures that the area around the hole is protected too.