Hex chamfered single face
Hex with hole
Hex with shoulder
Hex chamfered double faces
Hex unchamfered
BS 1981-1991
Unchamfered hexagon thin nuts
BS 1981-2004
Unchamfered hexagon thin nuts
BS 1981-2012
Unchamfered hexagon thin nuts
BS 1981-2017
Unchamfered hexagon thin nuts
BS 4183-8-1967
Hexagon nuts (unchamfered)-Table 8
BS 4183-8-2013
Hexagon nuts (unchamfered)-Table 8