SAE AS5234A-2019 PDF

Full title and description

SAE AS5234A-2019 — "NUT, COUPLING, FLARELESS": an SAE Aerospace technical standard that defines requirements, material/finish options and related product details for flareless coupling nuts used in aerospace fluid and tubing assemblies.

Abstract

This standard specifies the characteristics and procurement-related requirements for flareless coupling nuts used with aerospace tubing/fitting systems. It provides product identification, material and finish options coordinated with related SAE documents, and notes on compatibility with associated specifications to ensure interchangeability and reliable performance in aerospace applications.

General information

• Status: Revised / Active (AS5234 revised to AS5234A).
• Publication date: May 23, 2019 (AS5234A revision; original AS5234 issued May 2010).
• Publisher: SAE International (Society of Automotive Engineers).
• ICS / categories: Aerospace hardware / hose, pipe, tube and fittings; aerospace standards (SAE Aerospace). (Classification: aerospace fastener/fitting standards).
• Edition / version: AS5234A (2019 revision).
• Number of pages: 4 pages (brief technical standard).

Scope

Defines the dimensional, material/finish options, identification and procurement notes for flareless coupling nuts used with aerospace tubing and fittings. The document coordinates material and finish options with related SAE specifications and provides notes intended to ensure compatibility with mating fittings and proper logistics/identification in supply chains. (The published scope text in the source documents is brief; purchasers should consult the full standard for definitive scope language.)

Key topics and requirements

• Identification and marking requirements for flareless coupling nuts.
• Accepted material options and finish/plating criteria coordinated with related SAE/AMS specifications.
• Dimensional and fit requirements to ensure interchangeability with compatible flareless fittings.
• Notes on solid film lubricant and surface treatments where applicable (coordination with AS5233 noted in revision history).
• Procurement and supplier-related information (logistics/traceability considerations).

Typical use and users

Used by aerospace design, manufacturing and procurement teams specifying fluid tubing and fitting hardware; suppliers and manufacturers of aerospace fittings and coupling nuts; quality and inspection personnel who verify compliance to SAE procurement specifications; and maintenance/repair organizations requiring replacement parts that meet aerospace interchangeability and safety requirements.

Related standards

Cross-references and coordination exist with other SAE and AMS specifications (examples cited in product listings include AS5233 and various AMS part specifications used for materials, finishes and plating). Users should review the full standard for the list of cross-referenced documents when preparing specifications or procurement documents.

Keywords

flareless nut, coupling nut, tube fittings, aerospace fittings, AS5234A, SAE standard, material finish, interchangeability, procurement, tubing coupling

FAQ

Q: What is this standard?

A: SAE AS5234A-2019 is an SAE Aerospace technical standard titled "NUT, COUPLING, FLARELESS" that defines requirements for flareless coupling nuts used in aerospace tubing and fitting assemblies.

Q: What does it cover?

A: It covers identification, material and finish options, dimensional/fit considerations for interchangeability, and procurement/traceability notes relevant to flareless coupling nuts. The printed standard should be consulted for complete requirements.

Q: Who typically uses it?

A: Aerospace engineers, part designers, manufacturers and suppliers of fittings, procurement and quality personnel, and maintenance organizations specifying or accepting flareless coupling nuts for aerospace systems.

Q: Is it current or superseded?

A: As of its publication, AS5234A is the 2019 revised version of AS5234 (originally issued 2010). Buyers should verify the current status with SAE International for any later revisions or reaffirmations.

Q: Is it part of a series?

A: It is part of the family of SAE aerospace hardware and fittings standards and is coordinated with related SAE documents such as AS5233 and multiple AMS specifications referenced for material/finish requirements.

Q: What are the key keywords?

A: Flareless nut; coupling; tubing fittings; SAE AS5234A; aerospace hardware; material finish; interchangeability; procurement.