# DIN 7631 — Hydraulic and pipe connection type identification

For DIN 7631, region of origin is German Connections; thread type (tapered or parallel) is straight metric thread; seat or flare angle is 60°; seal method is The male connector has a straight metric thread with a 60° angle on the recessed cone. The female has a straight thread with a seat that is a tapered nose. The contact of the cone of the male and the tapered nose of the female flareless swivel is where the seal takes place, recorded from its source on 2026-08-13.

- **Connection type:** DIN 7631 _(verified: appears in the quote below)_
- **Governing standard:** DIN 7631 _(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:** 60° _(verified: appears in the quote below)_
- **Seal method:** The male connector has a straight metric thread with a 60° angle on the recessed cone. The female has a straight thread with a seat that is a tapered nose. The contact of the cone of the male and the tapered nose of the female flareless swivel is where the seal takes place. _(verified: appears in the quote below)_

## What the source says

> DIN 7631 series is a common metric-style connection in hydraulic systems. The male connector has a straight metric thread with a 60° angle on the recessed cone. The female has a straight thread with a seat that is a tapered nose. The contact of the cone of the male and the tapered nose of the female flareless swivel is where the seal takes place.

## 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/industrial-cross-reference-bearings-seals-fittings/).