Class 17H Lock Nuts DIN 936 BZP - M20 x 2.50

Used in pairs, lock nuts are applied to a matching male thread (examples include bolts, set screws and machine screws) and are a simple means of resisting vibration by tightening up against one another.

• Hexagon fits corresponding sockets and spanners.
• Conforms to DIN 936.
• Grade 4 steel.
• Bright Zinc Plate (BZP) finish offers resistance to corrosion.