Value Collection SEW7X1800-050BX M18 Lock Washer 21mm Id

Product Description

The VALUE COLLECTION SEW7X1800-050BX is an external tooth lock washer designed for use with M18 fasteners. It is manufactured from Grade 18-8 austenitic stainless steel, Designation A2, and carries an uncoated finish. The washer features an inside diameter of 21mm, an outside diameter of 33mm, and a thickness of 1.4mm. External teeth bite into the mating surface under torque load to resist fastener loosening caused by vibration or thermal cycling. This type of hardware is commonly installed by plumbers, pipefitters, electricians, and mechanical contractors wherever corrosion resistance and secure clamping are required.

This lock washer is suited for industrial, commercial, and trade applications where stainless steel hardware is specified for corrosion-prone environments. Typical installations include HVAC equipment connections, plumbing fixture assemblies, electrical panel mounting, and general mechanical assemblies requiring vibration-resistant fastening. The austenitic A2 stainless grade provides good resistance to moisture and mild chemical exposure, making it appropriate for both indoor and outdoor service conditions.

Key Features

• External tooth design grips mating surface to resist fastener rotation and loosening
• Grade 18-8 austenitic stainless steel, Designation A2, for corrosion resistance
• Inside diameter of 21mm, compatible with M18 fasteners
• Outside diameter of 33mm with a thickness of 1.4mm
• Uncoated finish suitable for stainless-appropriate applications
• Conforms to DIN 6797 and DIN 6798 standards

Compatibility

Designed for use with M18 screws and bolts. Conforms to DIN 6797 and DIN 6798 specifications for external tooth lock washers.

Installation Notes

Install between the fastener head or nut and the mating surface, with the teeth facing the fastener bearing surface. Power down or de-energize any associated equipment before performing fastener work in electrical or HVAC applications. Use appropriate torque tools to achieve proper clamp load without deforming the washer. Consult applicable codes such as the NEC or IPC for fastener and hardware requirements specific to your trade application.