Zoro Select
Zoro Select M50302.140.0018 Copper Sealing Washer M14 18mm 50pk
Copper sealing washers for M14 bolts, 14 mm inner and 18 mm outer diameter, 2 mm thick, pack of 50
- TypeWashers
- Copper construction resists corrosion in fluid systems
- Plain finish provides reliable sealing surface contact
- M14 inner diameter fits standard metric bolts
- 18 mm outer diameter distributes clamping load evenly
- Pack of 50 washers covers multiple service jobs
M14 Copper Sealing Washers — 50-piece pack
These annealed copper washers fit M14 bolts with a 14 mm inside diameter and 18 mm outside diameter. The 2 mm nominal thickness has a ±0.2 mm tolerance. They are supplied in a plain grey finish and come in a 50-count package for workshop or fleet maintenance.
Thermal and power behaviour in service
Copper conducts heat away from the joint, helping to maintain seal integrity under temperature cycling. The material is non-magnetic and does not add electrical resistance to grounded connections. No power draw or active cooling is involved.
Build quality and daily implications
Annealed copper yields a soft, repeatable seal that conforms to flange surfaces without galling. The plain finish avoids plating flake-off in fluid systems. Each washer is a single-piece metal component with no inserts, so handling and storage are straightforward.
Highlights
- Copper construction resists corrosion in fluid systems
- Plain finish provides reliable sealing surface contact
- M14 inner diameter fits standard metric bolts
- 18 mm outer diameter distributes clamping load evenly
- Pack of 50 washers covers multiple service jobs
Specifications
| Brand | ZORO SELECT |
|---|---|
| Type | Washers |
Questions about this item
How do I install the Zoro Select M14 copper sealing washers and what step is often missed?
Place the 14 mm inner diameter over the M14 bolt, seat the 18 mm outer face flat against the mating surface, and torque to specification; the step often missed is confirming the 2 mm thickness compresses evenly without galling the soft copper.
What maintenance or replacement will the Zoro Select M14 copper sealing washers need later?
Inspect each 14 mm ID washer at every fluid-service interval; replace the 50-piece pack if the annealed copper shows permanent deformation, cracking, or leakage paths after repeated heat cycles.
What limit appears first on the Zoro Select M14 copper sealing washers under sustained use?
The annealed copper yields at the +/- 0.2 mm thickness tolerance, so the first limit is loss of spring-back that lets the 18 mm OD seal relax and weep under prolonged vibration and thermal cycling.
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