DIN 7603 Sealing Washer — Complete Product Series

FULLERKREG DIN 7603 sealing rings are manufactured to DIN 7603 Form A standard in a full range of materials. DIN 7603 Form A is a flat (plain) sealing ring used for pipe flanges (DIN 3850), plug screws (DIN 908), ball-type pipe fittings, and hollow connections (DIN 7001). The flat profile provides full-face sealing through deformation of the sealing material under bolt clamping load. Available in copper T3, aluminum, and vulcanized fiber to suit all temperature, pressure, and electrical requirements. Size range d1 6–90 mm.

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Product Variants — Browse by Material

DIN 7603A Sealing Ring — Copper T3, Cleaned Natural Finish
T3 annealed copper (Cu-ETP) · Natural finish · d1 6–90mm · Max. +300°C · Metal-to-metal seal · Oil, fuel, hydraulic, steam · Re-annealable

DIN 7603A Sealing Ring — Aluminum, Cleaned Natural Finish
Soft annealed aluminum (Al 1050/1060) · Natural finish · d1 6–90mm · Max. +150°C · Lightweight (~1/3 weight of copper) · Oil, fuel, hydraulic · Automotive preferred

DIN 7603A Sealing Ring — Vulcanized Fiber, Natural Finish
Vulcanized fiber (hard fiber) · Natural finish · d1 6–90mm · Max. +120°C · Electrically insulating · Oil & fuel resistant · Most economical

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How to Choose the Right Material

Requirement	Recommended Material
High temperature (>+150°C) or steam	Copper T3 (up to +300°C)
General hydraulic, fuel, oil sealing	Copper T3 or Aluminum
Lightweight / automotive preference	Aluminum (~1/3 weight of copper)
Electrical insulation required	Vulcanized Fiber
Vibration damping required	Vulcanized Fiber
Most economical option	Vulcanized Fiber

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Material Comparison

Property	Copper T3	Aluminum	Vulcanized Fiber
Max. temperature	+300°C	+150°C	+120°C
Density	8.9 g/cm³	2.7 g/cm³	~1.3 g/cm³
Electrical insulation	No	No	Yes
Steam resistance	Yes	No	No
Oil & fuel resistance	Excellent	Excellent	Good
Sealing mechanism	Plastic deformation	Plastic deformation	Compression
Re-usable	Yes (re-anneal)	No	No
Cost	Medium	Low	Lowest

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DIN 7603 Standard Overview

• Standard: DIN 7603
• Form A: Flat plain ring — full-face sealing, general pipe fittings and plug screws
• Size range: d1 6–90 mm (inner diameter); d2 up to 100 mm (outer diameter)
• Thickness: b = 1.5mm (d1 6–28mm) · b = 2.0mm (d1 29–90mm)
• Used with: DIN 3850 pipe flanges · DIN 908 plug screws · DIN 7001 hollow connections
• All grades RoHS & REACH compliant

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Product Photo Gallery

FULLERKREG DIN 7603 Sealing Rings — product range overview:

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Why Choose FULLERKREG?

• 🏭 Direct manufacturer — factory in China, no middlemen
• 📐 Strict DIN dimensional control — 100% inspection on critical dimensions
• 🌍 Global export experience — serving distributors in Europe, North America, Southeast Asia
• 📦 Flexible MOQ — small trial orders and large bulk shipments both welcome
• 📋 Full documentation — material certs, RoHS declarations on request
• ⚡ Fast lead times — standard sizes in stock, ready to ship

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FULLERKREG Fasteners — Precision DIN Standard Fasteners, Direct from Manufacturer.
For wholesale inquiries, technical questions, or custom orders, please contact our sales team.