Masking Cap For M16 Screws, ID 15.9mm x OD 18.9mm, 63mm Long, Silicone (Milky White), Pack of 1, HLAS159-2-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.