Crowned sealing rings

Crowned sealing rings, DIN 7603 Form D.

Name: Crowned sealing rings
Brand: HBS Solutions

Solid sealing rings with a crowned (convex) profile for screw plugs and threaded connections – in copper, aluminium or soft iron to DIN 7603, from 4 × 8 to 90 × 100 mm.

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SPECIFICATIONDIN 7603 Form D · 16 × 20 · Copper · EN 10204 3.1Copper (DIN 7603 “Cu”), max. 45 HB – max. 300 °C.

01Material

Copper (DIN 7603 “Cu”), max. 45 HB – max. operating temperature 300 °C per DIN 7603.

02Size

d1 × d2 in mm – fits M16 threads. All DIN 7603 Form D sizes from 4 × 8 to 90 × 100 on request.

03Certificate

04Quantity

200 pcs

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Specifications

DIN 7603 Form D sizes and materials.

Material	Specification	Temperature	Forms
Copper	Copper (DIN 7603 “Cu”), max. 45 HB	max. 300 °C	DIN 7603 Form A / D
Aluminium	Aluminium Al99 (DIN 7603 “Al”), 32–45 HB	max. 200 °C	DIN 7603 Form A / D
Soft iron	Soft iron (DIN 7603 “St”), 80–95 HB	max. 400 °C	DIN 7603 Form A / D

Form D

Why a crowned ring?

The convex faces concentrate the contact pressure on a narrow band, so the ring seals by plastic deformation when the plug or fitting is tightened.

01Materials to DIN 7603Form D is standardised in copper (max. 300 °C), aluminium (max. 200 °C) and soft iron (max. 400 °C). Other metals to DIN 7603 dimensions on request.

02SizesEvery DIN 7603 Form D size from 4 × 8 to 90 × 100 mm. The most used sizes, for M8 to M60 threads, are in the configurator above.

03Flat or filled instead?For flat (Form A) or filled (Form C) rings, see our plug gaskets page →

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