# DIN 2353 / ISO 8434 — Hydraulic and pipe connection type identification

For DIN 2353 / ISO 8434, region of origin is German Connections; thread type (tapered or parallel) is straight metric thread; seat or flare angle is 24°; seal method is The straight metric thread male has a 24° angle. Its recessed counter-bore matches the tube O.D. it is connected to, recorded from its source on 2026-08-13.

- **Connection type:** DIN 2353 / ISO 8434 _(verified: appears in the quote below)_
- **Governing standard:** DIN 2353 / ISO 8434 _(verified: appears in the quote below)_
- **Region of origin:** German Connections _(our reading, not quoted from the source)_
- **Thread type (tapered or parallel):** straight metric thread _(verified: appears in the quote below)_
- **Seat or flare angle:** 24° _(verified: appears in the quote below)_
- **Seal method:** The straight metric thread male has a 24° angle. Its recessed counter-bore matches the tube O.D. it is connected to. _(verified: appears in the quote below)_

## What the source says

> DIN 2353 / ISO 8434 series is a common male with three different possible female halves. The straight metric thread male has a 24° angle. Its recessed counter-bore matches the tube O.D. it is connected to.

## Source

- https://brennaninc.com/connection-types/

Last verified: 2026-08-13. Review by: 2028-08-12.
Part of [Hydraulic and pipe connection type identification](https://referencesource.org/hydraulic-pipe-connection-types/).