# SAE J512 Inverted — Hydraulic and pipe connection type identification

For SAE J512 Inverted, governing standard is SAE J512; region of origin is American Connections; thread type (tapered or parallel) is straight thread; seat or flare angle is 45° flare; seal method is The male connector is either a 45° flare within the tube fitting or a 42° seat in the machined adapter. The female incorporates a straight thread with a 42° inverted flare. The fittings are sealed at the flared surfaces, recorded from its source on 2026-08-13.

- **Connection type:** SAE J512 Inverted _(verified: appears in the quote below)_
- **Governing standard:** SAE J512 _(verified: appears in the quote below)_
- **Region of origin:** American Connections _(our reading, not quoted from the source)_
- **Thread type (tapered or parallel):** straight thread _(verified: appears in the quote below)_
- **Seat or flare angle:** 45° flare _(verified: appears in the quote below)_
- **Seal method:** The male connector is either a 45° flare within the tube fitting or a 42° seat in the machined adapter. The female incorporates a straight thread with a 42° inverted flare. The fittings are sealed at the flared surfaces. _(verified: appears in the quote below)_

## What the source says

> SAE J512 inverted connections are typically used in automotive systems. The male connector is either a 45° flare within the tube fitting or a 42° seat in the machined adapter. The female incorporates a straight thread with a 42° inverted flare. The fittings are sealed at the flared surfaces. These threads also maintain a mechanical connection.

## 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/).