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Fifty copper sealing washers M12.5 plain finish

Zoro Select

Zoro Select M50301.125.0020 Sealing Washer M12.5 Copper 50 Pack

SKU CH-Y88M-Z8T41

Copper sealing washers for M12.5 bolts, 12.5 mm inner diameter, 20 mm outer diameter, 1.5 mm thick, pack of 50

  • Product typeWashers
  • Copper construction resists corrosion in fluid systems
  • 5 mm inner diameter fits M12.5 bolts precisely
  • 5 mm uniform thickness ensures consistent sealing
  • 20 mm outer diameter distributes load evenly
  • 50-piece pack covers multiple assembly jobs

Copper sealing washers for M12.5 bolts

These copper sealing washers fit M12.5 bolts and come in a pack of fifty. Each washer has an inside diameter of 12.5 mm and an outside diameter of 20 mm. The plain finish and annealed heat treatment suit general-purpose sealing tasks. The thickness is 1.5 mm with a tolerance of +/- 0.2 mm.

Automotive and industrial maintenance crews

Mechanics and maintenance teams who need a reliable copper seal on M12.5 fasteners will find this quantity convenient. Buyers who require a different bolt size, a different material such as aluminium or fibre, or a larger pack should look elsewhere.

1.5 mm thickness with +/- 0.2 mm tolerance

The uniform 1.5 mm thickness and tight tolerance determine whether the washer compresses correctly in your joint. Verify this dimension against your flange design before ordering.

How it compares

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

Price $12.99
Cheaper than about 65% of the 2,607 comparable items (median $18.99).

Specifications

Product
Brand nameZORO SELECT
Product typeWashers

Questions about this item

How can I verify the washers are sealing correctly after installation?

Check that each copper washer compresses evenly around the M12.5 bolt with no visible gaps; the 1.5 mm thickness should flatten slightly under torque to form a uniform seal.

What comes in the box and what must I source separately?

The pack contains 50 copper sealing washers with 12.5 mm inside diameter, 20 mm outside diameter and 1.5 mm thickness; bolts, nuts and thread sealant are not included.

Which version should I choose for an M12.5 metric bolt?

This single variant is made for M12.5 fasteners with a 12.5 mm bore, 20 mm outer diameter and 1.5 mm thickness — select it when those exact dimensions match your hardware.

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