Slot
Hex chamfered single face
Hex with flange
Hex with shoulder
Cheese with collar
Hex chamfered double faces
Nylon Insert
Pressing point prevailing torque
Side slotted
Straight-knurl
All-metal prevailing torque
Pressing point side
Conical spring washers
Ex-teeth CSK washers
IS 7002-1972
Prevailing torque type hexagon thick nuts with nonmetallic insert