SFS 2010-3.8 SHACSHAC SFS 2010 3. 8 Standard Ball Nut, 20 mm, 10 mm Lead The SHAC SFS 2010 3. 8 standard ball nut is a 20 mm diameter, 10 mm lead nut for medium speed CNC axes that need good load capacity with moderate feed rates. Its single nut construction provides efficient, smooth motion for compact industrial machines. Although SHAC is produced in China, its quality level rivals many Taiwanese brands, making it a clear upgrade over standard Chinese options. Abdul