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Twenty-five copper sealing washers M20 plain finish

Zoro Select

Zoro Select M50301.200.0026 Copper Sealing Washer M20 25 Pack

SKU CH-G88B-6VNSE

Copper sealing washers for M20 bolts, 20 mm inner by 26 mm outer diameter, 1.5 mm thick, pack of 25

  • Product typeWashers
  • Copper construction resists corrosion in fluid systems
  • 20 mm inner diameter fits M20 fasteners precisely
  • 5 mm uniform thickness maintains consistent sealing pressure
  • Annealed temper allows washer to conform under load
  • Pack of 25 supplies multiple joint assemblies

Copper Sealing Washers M20 25 Pack

These copper sealing washers fit M20 bolts with a 20 mm inner diameter and 26 mm outer diameter. The pack contains 25 pieces for maintenance or assembly tasks. They provide a reliable seal in hydraulic, plumbing or automotive systems. Each washer is annealed for consistent deformation under torque.

Plain Finish Annealed Copper

The plain finish and annealed copper construction allow the washer to conform to flange surfaces without additional coatings. A uniform thickness of 1.5 mm with a tolerance of .2 mm ensures even load distribution. The metric dimensions integrate directly into M20 threaded joints. No special tools are required beyond standard spanners or sockets.

25 Pack for M20 Joints

The 25 pack covers multiple connection points on a single project or provides spares for future repairs. Copper resists corrosion in fluid systems and maintains sealing performance over repeated temperature cycles. The washers are not suited for applications requiring larger bolt sizes or non-metallic sealing materials. Users needing different inner or outer diameters must select an alternative part.

How it compares

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

Price $6.99
Cheaper than about 91% of the 2,607 comparable items (median $18.99).

Specifications

Product
Brand nameZORO SELECT
Product typeWashers

Questions about this item

How much can the copper washer compress under the M20 bolt before it stops sealing?

The washer thickness is fixed at 1.5 mm with a tolerance of ±0.2 mm, so it does not compress further once the joint is torqued.

Does the copper generate heat or noise when the joint is under constant load?

Copper washers are passive metal seals; they produce no heat, noise or power draw during continuous operation.

What bolt size must I already have for these washers to fit correctly?

You need M20 metric bolts; the washer inside diameter is 20 mm and the outside diameter is 26 mm.

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