Zoro Select
Zoro Select M50302.300.0036 Sealing Washer M30 Copper Pack 10
Copper sealing washers for M30 bolts, 30 mm ID, 36 mm OD, 2 mm thick, pack of 10
- TypeWashers
- Copper construction resists corrosion in wet environments
- Annealed material conforms easily to irregular surfaces
- M30 inside diameter fits standard metric bolts
- 36 mm outside diameter spreads clamping force
- Pack of 10 covers multiple assembly points
Copper M30 Sealing Washer
These copper sealing washers fit M30 bolts with a 30 mm inner diameter and 36 mm outer diameter. Each washer is 2 mm thick with a ±0.2 mm tolerance and an annealed finish for reliable compression. The pack contains ten pieces for multiple joint assemblies. They suit maintenance, repair and fabrication tasks where a soft metal seal is required.
Metric Copper Sealing Limits
Copper deforms under load to seal flange faces but cannot withstand extreme pressure or high-temperature cycling like steel-reinforced gaskets. The plain finish offers no corrosion barrier beyond the base metal, so exposure to aggressive chemicals or salt spray will degrade the seal over time. Re-use is not recommended because the material work-hardens after initial compression, reducing its ability to re-seal. The 2 mm thickness provides a fixed compression range with no adjustment.
Ten-Pack Capacity and Headroom
Ten washers cover a typical M30 flange pattern or provide spares for field service kits. The annealed copper handles standard hydraulic and pneumatic pressures in pipework, valve bodies and pump housings. It runs out when joint movement exceeds the material’s elastic recovery or when temperatures approach copper’s annealing point, causing permanent softening. For larger bolt sizes or higher bolt loads a different diameter or thicker washer is required.
Highlights
- Copper construction resists corrosion in wet environments
- Annealed material conforms easily to irregular surfaces
- M30 inside diameter fits standard metric bolts
- 36 mm outside diameter spreads clamping force
- Pack of 10 covers multiple assembly points
Specifications
| Brand | ZORO SELECT |
|---|---|
| Type | Washers |
Questions about this item
Which pack size of the Zoro Select M50302.300.0036 sealing washer should I order for M30 bolts?
The product is sold as a single pack of 10 copper washers sized for M30 bolts with a 30 mm inner diameter and 36 mm outer diameter.
What does the 2 mm thickness mean when the washer is installed on an M30 fastener?
Each washer is 2 mm thick with a tolerance of ±0.2 mm, providing a consistent copper seal between the bolt head and the mating surface.
How does the plain copper finish affect the sealing performance on an M30 joint?
The annealed copper material and plain finish allow the washer to deform under torque, creating a reliable metal-to-metal seal for the M30 connection.
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