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Zinc-plated M20 internal-tooth lock washers, 50 pieces

Zoro Select

Zoro Select M37480.200.0001 Internal Tooth Lock Washer M20 50 pcs

SKU CH-T92R-74WZ5

Internal tooth lock washers with serrated teeth, zinc-plated spring steel, 21 mm inside diameter, 33 mm outside diameter, 1.40 mm thick, DIN 6798 J compliant, pack of 50

  • SizeM20
  • Product typeWashers
  • Serrated internal teeth resist loosening on M20 bolts
  • Spring steel at 350-425 HV10 maintains clamping force
  • Zinc plated finish protects against corrosion
  • Meets DIN 6798 J standard for reliable performance
  • Pack of 50 washers covers multiple fastening jobs

Product Identity

Zoro Select M37480.200.0001 internal tooth lock washers are supplied in a pack of 50 pieces for M20 screw sizes. Each washer has a 21.0 mm inside diameter, a 33.0 mm outside diameter and a 1.40 mm thickness. They are made from spring steel hardened to 350-425 HV10 with a zinc-plated finish and meet DIN 6798 J requirements.

Fit and Limits

These washers suit maintenance teams and assembly lines that need reliable locking on M20 fasteners in general-purpose applications. Buyers who require a different screw size, a non-serrated design or a material other than zinc-plated spring steel should look at alternative listings.

Accessory Impact

The 50-piece quantity supports batch work and reduces reorder frequency for recurring M20 jobs. No additional hardware, lubricants or installation tools are included in the package.

How it compares

Measured against everything we stock in General Hardware & Accessories, at today’s prices. Recalculated every night.

Price $25.99
Pricier than about 58% of the 2,607 comparable items (median $18.99).

Specifications

Product
Brand nameZORO SELECT
Product typeWashers
Size & build
SizeM20

Questions about this item

What bolt size do these M20 washers fit?

They fit bolt sizes M20 with an inside diameter of 21.0 mm and an outside diameter of 33.0 mm.

Will the 1.40 mm thickness work with standard M20 nuts?

Yes, the 1.40 mm thickness is designed for general-purpose use with standard M20 fasteners.

How can I confirm the washers meet the DIN 6798 J standard?

The spring steel hardness of 350-425 HV10 and zinc-plated finish indicate compliance with DIN 6798 J.

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