The Original SCHNORR® safety washer S is suitable for normal requirements and available for bolt sizes from M 1,6 to M 36. Hobson hold 304 stainless washers in stock. Please enquire should you require an item with different dimensions, material or surface treatment.

The Original SCHNORR® Safety Washer VS can be used with high-strength bolts of the grade 8.8 -10.9 without any restrictions. This extra strong safety washer has a greater thickness for higher pre-tensioning loads. The outside inside diameter as well and the serrations are the same as the S type. It can be delivered for screws M5 to M30. Hobson hold Plain and Zinc Plated in stock. Special sizes are also available upon request.

• High resistance to vibration due to positive locking of the serrations.
• Concentrical force transmission and uniform axial load eliminate bending torques and deformation of the bolt stem.
• The design of the serrations prevents friction and damage to components when tightening.
• Extremely high safety against loss of pretension force and loosening.
• Wide variety for materials and different finishes.
• The closed ring form results in high degree of pretensioning, while avoiding burst-open effect.
• Development and design of the washers take place on the basis of the screw geometrics, tightening torque as well as the constructive circumstances.