ISO 19632-2015 PDF

Full title and description

ISO 19632:2015 — Aerospace series — Fitting end, 24° internal cone, external thread, flareless type, extra fine thread pitch, inch series. Design standard specifying the geometry and required characteristics for flareless 24° cone fitting ends used in aerospace hydraulic and fluid systems.

Abstract

ISO 19632:2015 defines dimensions, tolerances and required characteristics for a flareless-type fitting end with a 24° internal cone and external extra-fine-inch-thread series for sizes −04 to −20 (tube diameters 6.35 mm to 31.75 mm / 1/4 in to 1 1/4 in). It is a design standard intended for aerospace hydraulic and fluid systems rated up to 35 000 kPa (5 080 psi). This document provides the nominal geometry and tolerance requirements for interchangeability and design, not procurement or test procedures.

General information

• Status: Published (confirmed on review).
• Publication date: July 2015.
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 49.080 (Aerospace fluid systems and components).
• Edition / version: Edition 1 (2015).
• Number of pages: 7.

Scope

The standard applies to fitting ends with a 24° internal cone, external thread, flareless type in the extra-fine inch thread series for sizes −04 through −20, intended for hydraulic and fluid systems in aerospace applications. It sets the dimensional data, tolerances and essential characteristics for design and interchangeability at system pressures up to 35 000 kPa (5 080 psi) for tube diameters from 6.35 mm to 31.75 mm (1/4 in to 1 1/4 in). ISO 19632 is a design standard — it specifies form and fit rather than test methods or procurement acceptance criteria.

Key topics and requirements

• Defined geometry of fitting end: 24° internal cone flareless configuration and related sealing surfaces.
• External extra-fine inch-thread specification for sizes −04 to −20 and associated dimensional tables.
• Tolerances and limit dimensions required for interchangeability between mating components.
• Pressure capability and intended application: hydraulic/fluid aerospace systems rated to 35 000 kPa (5 080 psi).
• Designation and marking conventions for identifying fitting-end type, size and style (design standard — not for ordering alone).

Typical use and users

This standard is used by aerospace design engineers, hydraulic-system designers, OEMs and component manufacturers of aerospace fluid fittings, drawing office and CAD teams specifying mating components, and quality/inspection personnel checking dimensional conformity of manufactured fitting ends. It is also referenced by procurement/specification writers when defining design requirements for aerospace hydraulic assemblies.

Related standards

ISO 19632 is one document in the aerospace fittings design family and is used alongside other regional and industry standards for 24° cone flareless fittings (for example EN/ASD design standards covering similar 24° cone flareless fitting ends and SAE/AS standards for fluid connections). Relevant complementary and referenced documents include standards on thread forms (UNJ/UN threads / ISO 3161 equivalents) and related European standards for 24° cone fittings and pipe couplings. These allied standards provide additional size coverage, variant sizes (e.g., −32) and regional design equivalents or related coupling specifications.

Keywords

aerospace; fitting end; 24° cone; flareless; external thread; extra fine thread pitch; inch series; design standard; hydraulic fittings; interchangeability; ISO 19632:2015.

FAQ

Q: What is this standard?

A: ISO 19632:2015 is an international design standard that specifies the form, dimensions and tolerances for a 24° internal cone, flareless-type fitting end with external extra-fine inch thread, intended for aerospace hydraulic and fluid systems.

Q: What does it cover?

A: It covers sizes −04 to −20 (tube diameters 6.35 mm to 31.75 mm / 1/4 in to 1 1/4 in), dimensional tables, tolerances and the essential characteristics required to design mating components for systems rated up to 35 000 kPa (5 080 psi). It is a design specification, not a procurement or test-method standard.

Q: Who typically uses it?

A: Aerospace OEM and supplier engineers, hydraulic-system designers, component manufacturers, drawing/CAD teams, and quality/inspection personnel — plus standards committees and procurement specialists who need to reference design geometry for interchangeability.

Q: Is it current or superseded?

A: The 2015 edition (Edition 1) is published and was reviewed/confirmed in ISO’s periodic review; at the time of publication it is listed as the current edition. Users should check their national/regional standards body or ISO catalogue for any later amendments or replacements before use.

Q: Is it part of a series?

A: Yes — ISO 19632 belongs to the broader aerospace fittings/design family (Aerospace series) and is used together with other design standards and thread/connection standards (regional equivalents such as EN/ASD documents and SAE design standards) to cover the range of fitting ends and couplings used in aerospace fluid systems.

Q: What are the key keywords?

A: 24° cone; flareless; fitting end; extra-fine thread pitch; inch series; aerospace hydraulic fittings; ISO 19632:2015.