Available in ER 16 and ER 20 sizes for Swiss automatic machine tool applications, standard and coolant versions of Hi-Q®/ERMX Mini-Nut feature anti-slip locking design that prevents locking wrench from slippage during assembly/disassembly. Milled slots on nut OD that mate with corresponding features of wrench promote operator safety while also helping to prevent damage to other tools. Surface treatment also enhances clamping forces and extends nut longevity by protecting against corrosion.