Value Collection SEW8XX2000-050BX M20 Lock Washer 316 Ss

Product Description

The VALUE COLLECTION SEW8XX2000-050BX is a stainless steel external tooth lock washer designed for use with M20 fasteners. Manufactured from Grade 316 Austenitic A4 stainless steel, this washer features a serrated external tooth profile that bites into mating surfaces to resist loosening under vibration and dynamic loads. With a 21mm inside diameter, 33mm outside diameter, and 1.4mm thickness, it is supplied uncoated and conforms to DIN 6797 and DIN 6798 standards. It is suited for installation by maintenance technicians, pipefitters, millwrights, and other trade professionals working in demanding mechanical assemblies.

This lock washer is appropriate for use in corrosion-resistant fastener assemblies where Grade 316 stainless steel is specified, including marine, chemical processing, food service, and coastal construction environments. The external tooth design provides a larger contact area than internal tooth variants, making it a common choice for through-bolt and machine screw applications on flat surfaces. It is sized for standard M20 hardware and fits applications where DIN 6797 or DIN 6798 compliance is required.

Key Features

• Grade 316 Austenitic A4 stainless steel construction offers strong resistance to chlorides and corrosive environments
• External serrated tooth profile locks against mating surface to prevent fastener loosening under vibration
• 21mm inside diameter sized for M20 screw applications
• Conforms to DIN 6797 and DIN 6798 standards
• Uncoated finish maintains dimensional integrity and avoids coating interference with electrical or grounding contact

Compatibility

Designed as a standard external tooth lock washer for use with M20 screws and bolts in assemblies requiring DIN 6797 or DIN 6798 compliant hardware.

Installation Notes

Install with the serrated teeth facing the bearing surface of the bolt head or nut, not against the workpiece, to achieve proper locking action. Ensure mating surfaces are clean and free of excessive coatings that may prevent tooth engagement. Do not reuse lock washers that have been fully compressed, as the tooth profile will not provide reliable retention after plastic deformation. Follow applicable mechanical or structural codes for fastener torque and assembly sequence.