Speciality Fasteners Schnorr Safety Washers - M4

The Speciality Fasteners Schnorr Safety Washers are designed to provide enhanced security and stability when used with M4 screws and bolts. These innovative washers feature a serrated disc spring design with a trapezoidal cross section, which allows for universal compatibility with various screw and bolt types.

The internal diameter of the Schnorr Safety Washer is matched to the thread diameter of the screw or bolt, while the outer diameter is designed to fit the head diameter of pan-head and hexagon socket head cap screws and bolts. This means that these washers can be used with practically any type of screw or bolt, including those with recessed heads (excluding countersunk screws and bolts).

The ingenious design of the Schnorr Safety Washer combines the advantages of security through friction and mechanical locking. The serrated cross section ensures a high level of resistance to loosening, providing a secure and reliable connection.

• High resistance to vibration due to positive locking of the serrations
• The closed ring form results in a high degree of pretensioning, ensuring an excellent frictional connection
• Concentric application of force eliminates bending in the bolts
• Sliding surfaces allow tightening without damaging the surfaces
• No splitting during tightening with proper transitional radius between bolt shaft and bolt head

The Schnorr Safety Washer is suitable for normal duty applications and can be used with a wide range of bolts. Supplied in packs of 10, these washers are designed to provide enhanced security and stability while ensuring ease of use.