copper washers factory for Sealing, Electrical, and Industrial Assemblies
XZ Fastener manufactures copper washers for sealing, electrical grounding, thermal transfer, hydraulic fittings, automotive repair kits, plumbing hardware, and custom industrial assemblies. Parts can be supplied as flat copper washers, sealing washers, crush washers, shims, spacers, and made-to-drawing washers according to order requirement. Buyers can specify copper grade, inner diameter, outer diameter, thickness, hardness, annealed condition, surface finish, tolerance, packing, and inspection level. Copper washers can also be ordered with bolts, nuts, screws, fittings, and related fastener products for complete assembly purchasing.
Quick Specs
What Buyers Should Know Before Sourcing Copper Washers
Copper washers are often selected when the assembly needs ductility, electrical conductivity, thermal transfer, or a soft sealing interface. Before ordering, buyers should confirm whether the washer is used as a flat bearing washer, a sealing washer, a crush washer, a spacer, or a shim. The same outside diameter and inside diameter can perform differently if hardness, burr control, and annealing condition are changed.
For standard washer purchasing, compare requirements with available flat washers. For non-standard dimensions, special thickness, or assembly matching, XZ Fastener can review drawings through its custom fasteners service.
Common Purchasing Descriptions
- Annealed copper sealing washer, ID x OD x thickness, packed in small bags.
- Flat copper washer for electrical grounding, deburred both sides.
- Copper crush washer for hydraulic and automotive fittings, soft condition.
- Custom copper shim washer according to drawing and tolerance requirement.
- Thin copper spacer washer with clean surface and export carton packing.
- Consolidated factory order including copper washers, sealing washers, DIN 933 full thread hex bolts, Grade 8.8 carbon steel hex bolts, metric hex head bolts, zinc plated DIN 933 bolts, black oxide DIN 933 bolts, and hot dip galvanized DIN 933 bolts.
Detailed Specifications Table
| Item | Typical Options | Buyer Notes |
|---|---|---|
| Product Type | Flat washer, sealing washer, crush washer, shim washer, spacer washer, special washer | Confirm whether the part is mainly for sealing, spacing, conductivity, or load distribution. |
| Size Range | Metric and inch sizes can be supplied according to drawing or sample | Provide ID, OD, thickness, and tolerance. A drawing is recommended for non-standard parts. |
| Material | C110 electrolytic tough pitch copper, C102 oxygen-free copper, C122 deoxidized copper, equivalent grades | Material selection depends on conductivity, forming, corrosion exposure, and sealing behavior. |
| Hardness Condition | Soft annealed, half-hard, hard condition available upon request | Sealing washers usually require a softer condition than general spacer washers. |
| Manufacturing Method | Stamping, punching, CNC turning, deburring, annealing, cleaning, optional plating | Thick, small-lot, or high-precision washers may be more suitable for machining. |
| Surface Condition | Natural copper, bright cleaned, tumbled, anti-tarnish, tin plated, nickel plated | Choose according to storage, conductivity, solderability, and appearance requirement. |
| Packing | Bulk carton, inner bag, small box, label by size, pallet packing | Mixed sizes should be clearly separated to reduce receiving inspection time. |
| Inspection | Dimension check, burr check, visual inspection, hardness check, material confirmation | Inspection reports can be prepared according to order requirement. |
For size selection and washer terminology, buyers can also review XZ Fastener’s flat washer sizing and material guide before sending an inquiry.
Material and Grade Explanation
Copper washers are usually ordered by copper grade or by a recognized equivalent. C110 is widely used where good electrical and thermal conductivity are important. C102 oxygen-free copper can be considered for applications that require higher purity or controlled oxidation behavior. C122 deoxidized copper is often selected where forming and corrosion resistance are important.
For sealing applications, material grade is only one part of the decision. Annealing condition, washer thickness, contact surface, and tightening method all affect sealing performance. When buyers have drawings, assembly photos, or a mating bolt and fitting standard, XZ Fastener can review the made-to-drawing fastener material requirements before production confirmation.
Surface Finish Selection Guide
- Natural copper: Common for general sealing, conductive, and spacer applications.
- Bright cleaned: Suitable where a cleaner surface appearance is required before assembly.
- Annealed finish: Used when softer deformation is needed for sealing or crush washer use.
- Tumbled and deburred: Helps reduce sharp edges after stamping or punching.
- Tin plated: Can improve solderability and reduce surface oxidation in some electrical assemblies.
- Nickel plated: Available upon request for selected environments and appearance requirements.
- Anti-tarnish packing: Helpful for long storage or export shipment where surface color matters.
Manufacturing and Quality Control
Production can include sheet material preparation, die stamping, punching, CNC machining for special sizes, deburring, cleaning, annealing, optional plating, sorting, and packing. For small washers and thin copper parts, burr direction, edge condition, and thickness tolerance should be confirmed before order release. For sealing washers, flatness and hardness condition are especially important.
XZ Fastener checks incoming material, production dimensions, visual appearance, and packing details according to the purchase order. Buyers who need traceable checks can refer to XZ Fastener’s raw material inspection process and fastener quality control notes when preparing inspection requirements.
Applications
Electrical Assemblies
Used for grounding, busbar connections, conductive spacing, battery hardware, and electrical cabinets where copper conductivity is useful.
Hydraulic and Fluid Fittings
Soft copper sealing washers can deform under tightening load to help seal selected hydraulic, oil, fuel, and fluid connections.
Automotive Repair Kits
Copper crush washers are commonly included in service kits, brake line fittings, drain plugs, and aftermarket hardware packs.
Plumbing and HVAC
Used in pipe fittings, valves, thermal transfer points, and maintenance assemblies where copper compatibility is required.
Machinery and Instruments
Thin copper shims and spacer washers can adjust gaps, protect surfaces, and support controlled assembly spacing.
Custom Equipment Builds
Made-to-drawing copper washers can be supplied for equipment manufacturers with repeated size lists and special packing needs.
How to Get a Faster Quotation
For standard copper washers, send a size list with ID, OD, thickness, material grade, hardness condition, finish, quantity, and packing method. For custom washers, include a drawing, sample photo, tolerance notes, burr direction requirement, surface finish, and assembly purpose. If the washers will be used for sealing, please also advise the mating fitting material, working medium, and tightening condition if available.
For export orders, clear packing labels, separated sizes, carton weight limits, pallet requirement, and inspection documents help reduce confirmation time. Buyers can contact XZ Fastener with drawings and order details for review.
FAQ
Can XZ Fastener supply copper washers according to a custom drawing?
Yes. Copper washers can be supplied according to drawing, sample, or detailed size list. Please provide inner diameter, outer diameter, thickness, tolerance, material grade, hardness condition, surface requirement, quantity, and packing method.
What is the difference between a flat copper washer and a copper crush washer?
A flat copper washer is commonly used for load distribution, spacing, or conductivity. A copper crush washer is usually softer and designed to deform under tightening load to help create a seal in suitable fittings.
Can copper washers be annealed before shipment?
Yes. Annealed copper washers are available upon request. Buyers should specify whether soft annealed, half-hard, or hard condition is needed, because hardness affects sealing, forming, and handling behavior.
Which dimensions are required for a washer inquiry?
The most important dimensions are inner diameter, outer diameter, thickness, and tolerance. For non-standard parts, a drawing is recommended, especially when chamfer, flatness, burr control, or special edge condition is required.
Can copper washers be packed by size and part number?
Yes. Copper washers can be packed in bulk cartons, inner bags, small boxes, or palletized cartons. Labels by size, part number, quantity, and order reference can be arranged according to order requirement.
Can copper washers be ordered together with bolts, nuts, and other fasteners?
Yes. Copper washers can be combined with bolts, screws, nuts, fittings, and other fastener items for consolidated purchasing. Please provide the full item list so matching size, finish, and packing details can be reviewed together.
Send Your Copper Washer Inquiry
For a faster quotation, send your size list, copper grade, finish, quantity, packaging method, and inspection requirements. If available, include drawings, samples, assembly photos, or part numbers so XZ Fastener can check the practical production route and packing plan.
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