A series of silicone insert couplings feature electrical isolation and no backlash. These metric couplings, identified as the S54HSAM (clamp type) and S5PSAM (set screw type) Series are stocked in 5 different bore sizes ranging from  0.24 to 0.63 in. (6 to 16 mm). These couplings have aluminum hubs with either set screws or clamps for fastening to shafts. The insert is silicone 40 ShA. The operating temperature ranges from -58 to 302°F (-50 to 150°C). They range in length from 1.04 to 2.24 in. (26.5 to 57 mm). Their maximum speed is 5,000 rpm. They can be used in various applications and are especially able to accommodate tight or skewed connections.