A 5/16 Cycle thread hexagon set bolt (threaded up to head)Under head dimension: 1/2". Standard hexagon size (.525" A/F)Head machined flat (no markings).
A 5/16 Cycle thread hexagon set bolt (threaded up to head)Under head dimension: 3/4". Standard hexagon size (.525" A/F)Head machined flat (no markings).