Masking Cap For M20 Screws, ID 19.8mm x OD 22.8mm, 38mm Long, Silicone (Milky White), Pack of 1, HLAS198-P
SGD $3.30
The most basic masking cap, our GA series is cylindrical and able to protect the most commonly used screw hole diameters. In addition, there is a wide range of sizes to mask even holes with odd sizes.