20 Pcs M6–M27 Metric Combined Washers Zinc Plated Hydraulic Seal

JARBLUE 20-Piece Metric Combined Washer Set — M6 to M27

Keep hydraulic joints leak-free and connections secure with the JARBLUE Metric Self-Core Combined Gasket Set. Each washer pairs a white zinc-plated steel outer ring with a bonded rubber inner seal, delivering a reliable dual-action seal that handles both mechanical clamping and fluid-tight sealing in a single fastener. The pack of 20 covers the full M6–M27 metric range, making it an essential assortment for workshops, hydraulic systems, plumbing lines, and machinery maintenance.

Made in Mainland China.

Key Features

• Full M6–M27 Range: One kit covers a wide variety of bolt sizes, reducing the need for multiple orders.
• White Zinc Plating: Corrosion-resistant finish protects the steel ring in demanding environments.
• Bonded Rubber Core: Self-sealing rubber insert compresses evenly under bolt load to prevent fluid or gas leakage at hydraulic joints.
• 1.5 mm Thickness: Consistent thickness across all sizes for predictable, uniform sealing performance.
• CE & RoHS Certified: Meets recognized safety and environmental standards — no high-concern chemicals.
• Pack of 20: Ample quantity for projects, repairs, and service kits.

Specifications

Common Applications

• Hydraulic pipe fittings and banjo bolts
• Engine and gearbox drain plugs
• Pneumatic system connections
• Plumbing and fluid transfer lines
• General machinery and equipment maintenance

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Frequently Asked Questions

Q: What sizes are included in the 20-piece metric combined washer set?

A: The set covers the M6 through M27 metric bolt size range. The 20-piece assortment is designed to provide a practical spread of sizes for hydraulic joints, drain plugs, and general sealing applications across a wide variety of equipment.

Q: What is the purpose of the rubber core in these combined washers?

A: The bonded rubber inner seal compresses when the fastener is tightened, creating a fluid-tight or gas-tight barrier at the joint. The zinc-plated steel outer ring simultaneously distributes clamping load, protecting the seating surface — so one washer performs both mechanical and sealing functions at once.

Q: Are these washers suitable for hydraulic system use?

A: Yes. These metric combined gaskets are specifically designed for hydraulic joint sealing applications. The CE and RoHS certifications confirm they meet established safety and environmental standards, and the white zinc plating provides corrosion resistance suitable for demanding hydraulic environments.

Q: How thick are the washers in this set?

A: All washers in the set have a uniform thickness of 1.5 mm, ensuring consistent and predictable sealing performance regardless of the bolt size used.

Production & Packaging Notice

To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.