Value Collection SIW7X2000-050BX M20 Internal Tooth Lock Washer

Product Description

The VALUE COLLECTION SIW7X2000-050BX is an M20 internal tooth lock washer designed to maintain fastener tension and resist loosening caused by vibration and dynamic loads. Manufactured from Grade 18-8 austenitic stainless steel (A2), it offers reliable corrosion resistance in wet, chemical, or outdoor environments. The washer features an uncoated finish and measures 21mm inside diameter, 33mm outside diameter, and 1.4mm thickness. It is installed under bolt heads or nuts in assemblies where standard flat or split washers may not provide adequate bite. Licensed trades and industrial maintenance technicians use this fastener component across plumbing, electrical, HVAC, and general mechanical installations.

This washer is suited for use in M20 fastener assemblies across residential, commercial, and light industrial applications. Its internal tooth geometry bites into the mating surface to prevent rotation and maintain clamp load. The stainless steel construction makes it appropriate for installations where carbon steel washers would be prone to rust or galvanic corrosion concerns. DIN 6797 and DIN 6798 standards govern its dimensional and performance requirements.

Key Features

• Internal tooth design bites into both the fastener and mating surface to resist loosening under vibration
• Grade 18-8 austenitic stainless steel construction provides corrosion resistance without coatings
• Uncoated finish is compatible with a wide range of mating surfaces and fastener finishes
• Meets DIN 6797 and DIN 6798 dimensional standards
• 21mm ID sized for M20 bolt and screw applications

Compatibility

Designed as a standard internal tooth lock washer for M20 fastener assemblies conforming to DIN 6797 and DIN 6798 specifications.

Installation Notes

Installation is performed by placing the washer under the bolt head or nut before tightening, with the teeth facing the mating surface for maximum grip. Ensure mating surfaces are clean and free of debris to allow the teeth to seat properly. Stainless steel fastener components can be susceptible to galling during assembly; apply appropriate anti-seize compound if required by the application. Follow applicable mechanical and structural codes for fastener torque and assembly requirements.