Our highest tensile of Imperial Lock Nuts is our Grade 9 or L9 range. Previously known as FX180.
The L9 Grade 9 fastening range has a tensile strength of 180,000psi.
Thread = 20 TPI (Thread per Inch)
UNC (Unified National Coarse Thread)
Hexagon head Across the Flats ( AF ) = 7/16"
High Tensile Grade 9
Yellow Zincplated Finish
