1/2" diameter & larger Grade 5 bolts are becoming obsolete, in future these will only be available in Grade 8.
Thread = 20 TPI (Thread per Inch)
UNF (Unified National Fine Thread)
Hexagon head Across the Flats ( AF ) = 3/4"
Medium High Tensile Grade 5
Zincplated Finish
Fully Threaded
