Zoro Select
Zoro Select M50302.380.0044 Sealing Washer M38 Copper 10 Pack
Copper sealing washers for M38 bolts, 38 mm inner and 44 mm outer diameter, 2 mm thick, pack of 10
- TypeWashers
- Copper material resists corrosion in fluid systems
- Annealed finish ensures reliable sealing under pressure
- Precise 38 mm inner diameter fits M38 bolts exactly
- Consistent 2 mm thickness with tight +/- 0.2 mm tolerance
- Ten-piece pack covers multiple connection points efficiently
Copper sealing washers for M38 bolts
These copper sealing washers suit M38 fasteners in hydraulic, fuel or high-pressure plumbing systems. The annealed copper conforms under torque to create a reliable metal-to-metal seal. Each washer measures 38 mm inside diameter by 44 mm outside diameter with a uniform 2 mm thickness. The pack contains ten pieces for multiple joint assemblies.
Fits M38 threads and 44 mm counterbores
The washers slide over M38 bolts or studs and seat against a 44 mm landing surface. Their plain finish and consistent 2 mm profile leave no raised features to interfere with adjacent components. The +/- 0.2 mm thickness tolerance keeps stack-up predictable in precision manifolds or pump housings. Copper construction resists galling during repeated disassembly.
Ten washers cover several connection points
A single pack services up to ten sealing faces on an M38 circuit. The annealed temper ensures each washer yields evenly at standard torque values without work-hardening. Copper’s thermal stability maintains seal integrity across wide temperature swings. Builders needing larger diameters, different materials or bulk quantities will need additional sources.
Highlights
- Copper material resists corrosion in fluid systems
- Annealed finish ensures reliable sealing under pressure
- Precise 38 mm inner diameter fits M38 bolts exactly
- Consistent 2 mm thickness with tight +/- 0.2 mm tolerance
- Ten-piece pack covers multiple connection points efficiently
Specifications
| Brand | ZORO SELECT |
|---|---|
| Type | Washers |
Questions about this item
How thick is each M38 copper sealing washer?
Each washer measures 2 mm thick with a tolerance of ±0.2 mm.
Does the copper material soften or conduct heat differently after long exposure to hot fluids?
The washers are annealed copper, so they stay ductile and maintain a consistent seal through thermal cycles.
What bolt size and surface finish do these washers require for a proper seal?
They fit M38 bolts and have a plain finish that mates directly with the flange.
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