Schnorr safety washers

SCHNORR Safety Washer Introduction

SCHNORR safety washers can be made from different materials and are available with various surface finishes.

The original SCHNORR safety washer was developed as a reliable and economical bolt locking device, based on the principle of a disc spring. This clever

design combines the safety advantages of friction and mechanical locking. Original SCHNORR safety washers are now used worldwide wheresecure

fastening connections are required to resist vibration, thermal expansion, and other influences.

Applications span many industries including automotive, machinery, plant engineering, conveyors, and electrical sectors. Wherever reliable fastener securing is needed.  

SCHNORR safety washers are used, for example, in lawn mowers, textile machinery, machine tools, and many other applications.

The original SCHNORR safety washer features a disc spring shape with trapezoidal cross-sections and serrations on both sides. The outer diameter matches the head diameters of pan head and hex socket screws.

Matches the head diameter.

SCHNORR Safety Washer Classification

SCHNORR safety washers are available in two versions. The standard safety washer "S" is suitable for screw sizes from M1.6 to M36 with property classes up to 8.8. For screws with property classes 8.8 and 10.9, higher preload may be required. These are covered by our reinforced washer "VS".

Due to the conical shape, optimal traction force is achieved at high positive locking through the helical gear effect.

1. Original SCHNORR safety washer "S"

Original SCHNORR safety washer "S" is suitable for normal requirements, for M 1.6 to M 36 bolt sizes, up to class 8.8. If you require products in different sizes, materials, or surface finishes, please contact us for inquiries.

Materials and Finishes

Part Number: Suitable for standard version made of spring steel, hardened, blackened; mechanical sheet

H Max: Maximum size as delivered

H Min: Minimum size after load testing

Available material grades: Spring steel acc. According to DIN EN 10132-4; Corrosion-resistant steel 1.4301; Phosphor bronze CuSn8; Nickel-cobalt alloy; Creep-resistant steel 1.4122; Inconel

Surface finishes: Black (standard), bronze-colored, phosphated, galvanized, zinc flake coating Inconel

Schnorr Safety Washer Type V Selection Parameter Table

2. Original SCHNORR safety washer "VS", greater thickness

Original SCHNORR® safety washers "VS" can be used with 10.9 grade high-strength bolts without any restrictions. This very robust safety washer has a greater thickness and can withstand higher preload loads. The outer diameter, inner diameter, and serrations are the same as the "S" type. Available for M 5 to M M screws. Special sizes, materials, and surfaces are also available upon request.

Materials and Treatment

Product Number: Suitable for standard version made of spring steel, hardened, blackened; mechanical plating

H Max: Maximum dimensions in delivery condition

H Min: Minimum size after load testing

Available material grades: Spring steel acc. According to DIN EN 10132-4; Corrosion-resistant steel 1.4301; Phosphor bronze CuSn8; Nickel-cobalt alloy, creep-resistant steel 1.4122; Inconel

Surface finishes: Black (standard), bronze-colored, phosphated, galvanized, zinc flake coating Inconel

Schnorr Safety Washer VS TypeSelection Parameter Table

Weidou Intelligent Technology is a professional agent selling SCHNORR safety washers S type, SCHNORR safety washers VS type, with complete models, favorable prices, and providing high-quality service to customers.