SAE MA4147A-2019 PDF

Full title and description

SAE MA4147A-2019 — BOLT, SPLINE DRIVE, EXTENDED WASHER, REDUCED SHANK, AMS5662 (UNS N07718) 1275 MPa UTS, METRIC. This SAE technical standard defines the design, material, mechanical-property and procurement requirements for metric spline‑drive bolts with an integral/extended washer and reduced shank manufactured from AMS5662 (UNS N07718 / Inconel 718) and intended for aerospace applications where a minimum ultimate tensile strength of approximately 1275 MPa is required.

Abstract

MA4147A-2019 sets dimensional, material, heat‑treatment, testing and acceptance criteria for a specific aerospace fastener configuration: a spline‑drive head bolt with extended washer and reduced shank produced from AMS5662 (Inconel 718) in metric sizes. The document covers mechanical-property limits (including the 1275 MPa UTS requirement), chemical composition conformance to AMS5662, typical heat‑treatment/aging conditions, inspection and test methods (tensile, hardness, chemical analysis), marking and procurement notes relevant to aircraft propulsion and high‑temperature/ corrosion‑resistant fastener applications.

General information

• Status: Revised (MA4147A).
• Publication date: Revised December 27, 2019 (original issue June 1992; reaffirmed October 2013).
• Publisher: SAE International.
• ICS / categories: 49.030 (Fasteners for aerospace construction); 49.030.20 (Bolts, screws, studs).
• Edition / version: MA4147A (2019 revision).
• Number of pages: 11 pages.

Scope

This standard specifies requirements for metric spline‑drive bolts having an extended washer and reduced shank, manufactured from AMS5662 (UNS N07718, Inconel 718) and intended for aerospace applications (notably propulsion and other high‑temperature or corrosion‑resistant locations). It establishes dimensional parameters, material and heat‑treatment conformance, minimum mechanical properties (including a tensile strength class near 1275 MPa), required tests (mechanical, chemical and hardness), marking, and procurement/acceptance criteria. It is intended for designers, manufacturers and procuring authorities requiring a standardized fastener for critical aerospace assemblies.

Key topics and requirements

• Fastener configuration: spline‑drive head with extended washer and reduced shank (metric).
• Base material: AMS5662 (UNS N07718 / Inconel 718) — composition and melting/processing requirements per AMS5662.
• Mechanical property class: minimum ultimate tensile strength specification around 1275 MPa and associated yield/elongation expectations.
• Heat treatment and aging practices appropriate for AMS5662 to achieve specified properties.
• Dimensional tolerances, head and spline detail, and reduced‑shank geometry for mating/installation compatibility.
• Inspection and test requirements: tensile testing, hardness, chemical analysis, and acceptance criteria for lot release.
• Identification, marking and traceability requirements for aerospace procurement.
• Application focus on aerospace propulsion and other high‑temperature, corrosion‑resistant fastener uses.

Typical use and users

Used by aerospace OEMs, fastener manufacturers, design and stress engineers, procurement/specification specialists, quality/acceptance inspectors, and maintenance/repair organizations that require high‑strength, corrosion‑resistant metric bolts for engine and other high‑temperature aircraft applications. Typical uses include critical fastening points in propulsion systems and other areas requiring Inconel 718 fasteners with precise geometry and high tensile capability.

Related standards

Relevant and related documents include AMS5662 (material specification for UNS N07718 / Inconel 718), AMS5663/AMS5662 series (heat‑treatment/aging and product forms), SAE procurement/classification guidance for aerospace fasteners, and other SAE/industry specifications for nickel‑alloy fasteners and bolt dimensional standards. ISO/ICS categories for aerospace fasteners (49.030 and subitems for bolts, screws and washers) are also related for cross‑referencing.

Keywords

SAE MA4147A, bolt, spline drive, extended washer, reduced shank, AMS5662, UNS N07718, Inconel 718, 1275 MPa UTS, metric, aerospace fastener, propulsion, heat treatment, tensile strength, corrosion resistant alloy.

FAQ

Q: What is this standard?

A: SAE MA4147A-2019 is an SAE technical standard that defines the design, material and test requirements for a metric spline‑drive bolt with extended washer and reduced shank made from AMS5662 (UNS N07718 / Inconel 718) and specified for high‑strength aerospace use (about 1275 MPa UTS).

Q: What does it cover?

A: It covers dimensional configuration, material conformance (AMS5662), heat‑treatment guidance, mechanical property requirements (including the 1275 MPa tensile class), inspection and testing (tensile, hardness, chemical), identification and procurement/acceptance criteria for the specified bolt type.

Q: Who typically uses it?

A: Aerospace bolt manufacturers, design and stress engineers, procurement/specification teams, quality inspectors, and maintenance/repair organizations involved with aircraft propulsion and other high‑temperature or corrosion‑resistant fastening applications.

Q: Is it current or superseded?

A: The MA4147A edition is a 2019 revision (MA4147A, revised December 27, 2019). It supersedes earlier MA4147 releases; users should confirm with SAE International for any later revisions after 2019 before procurement or qualification.

Q: Is it part of a series?

A: Yes — it is part of SAE's MA (Aerospace Materials and Fasteners) series of technical standards and cross‑references material specifications such as AMS5662 for the underlying alloy. It is grouped with other SAE fastener/product standards used in aerospace engineering committees (for example, committee E‑25 topics for propulsion systems).

Q: What are the key keywords?

A: spline drive, extended washer, reduced shank, bolt, AMS5662, UNS N07718, Inconel 718, 1275 MPa, metric, aerospace fastener, SAE MA4147A.