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Locking disc spring washer Type M

Article No. 040120

Steel flake zinc silver Geomet shape M WSH-SER-M-(GE321)-D21,0

€1.12 inc. VAT price per 1 PCS

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Spring steel, zinc flake GEOMET 321

Powerful, form-fitting locking of screw connections against loosening and unscrewing

Type M: for high-strength connections with normal head contact
Hardened spring steel, 420-510 high strength 10, GEOMET^® 321-coated
Spring force for friction-fit connection
Specially embossed surface for form-fit connection
Reusable
Protects the counter surface from damage (washer does not turn during installation)
Minimal tightening torque distribution
Universal application, e.g. also suitable for slot fastening and sheet-metal screw joints

Notice

The extremely reliable positive locking effect against unscrewing has been verified through the application of a dynamic load (vibration) across the screw axis in many practical tests.

GEOMET® is a brand of Metal Coatings International Inc.

Specification
Application
Technical Information

Spring steel, zinc flake GEOMET 321

Powerful, form-fitting locking of screw connections against loosening and unscrewing

Type M: for high-strength connections with normal head contact
Hardened spring steel, 420-510 high strength 10, GEOMET^® 321-coated
Spring force for friction-fit connection
Specially embossed surface for form-fit connection
Reusable
Protects the counter surface from damage (washer does not turn during installation)
Minimal tightening torque distribution
Universal application, e.g. also suitable for slot fastening and sheet-metal screw joints

Notice

The extremely reliable positive locking effect against unscrewing has been verified through the application of a dynamic load (vibration) across the screw axis in many practical tests.

GEOMET® is a brand of Metal Coatings International Inc.

Application area

Machine and system construction, drive technology, conveyor technology, utility vehicles, construction machines, vehicle construction, agricultural technology, the food industry etc.

Products specifications

Suitable for screw thread	M20
Internal diameter (d₁)	21 mm
Outer diameter (d₂)	40 mm
Height (h₁)	4.3 mm
Thickness (s₁)	3 mm
Material	Spring steel
Surface	Flake zinc silver
RoHS-compliant	Yes
Corrosion protection period	720 h
Form	M
Suitable for	High-strength bonds
Min./max. Vickers hardness, HV	420-510 HV
Tightening torque for strength class 8.8	460 Nm
Max. temperature conditions	180 °C
Tightening torque for strength class 10.9	650 Nm

Products specifications

Suitable for screw thread	M20
Internal diameter (d₁)	21 mm
Outer diameter (d₂)	40 mm
Height (h₁)	4.3 mm
Thickness (s₁)	3 mm
Material	Spring steel
Surface	Flake zinc silver
RoHS-compliant	Yes
Corrosion protection period	720 h
Form	M
Suitable for	High-strength bonds
Min./max. Vickers hardness, HV	420-510 HV
Tightening torque for strength class 8.8	460 Nm
Max. temperature conditions	180 °C
Tightening torque for strength class 10.9	650 Nm