Our Metric Nuts in Types H and HNL are engineered to meet stringent torque requirements for IFI 100/107 Grade B (unified) and ANSI B18.16.1M (metric) locknuts. Designed for optimal performance, Type H is suitable for use in sheet hardness HRB 80 or less on the Rockwell “B” scale, while Type HNL is ideal for sheet hardness HRB 60 or lower. Crafted from durable carbon steel and finished with reliable zinc plating, these nuts ensure secure fastening in various applications. Additionally, they are compliant with RoHS regulations, guaranteeing their environmental responsibility. Explore our animation for a closer look at their functionality.