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Threaded Jackets: A Guide to Aerospace Standardization


Aerospace Standardization Guidelines


Release time: May 17, 2024


As the aerospace industry shifts toward greener practices and strives to improve operational efficiency, the role of each component, down to the smallest threaded jacket, becomes critical.These tiny but vital components ensure the integrity and reliability of mechanical joints, ensuring they can withstand extreme conditions while meeting strict environmental standards.


This guide takes an in-depth look at the specific aerospace specifications that govern the application and quality of thread sleeves.Meeting these stringent standards ensures parts meet high performance thresholds while helping to achieve the sustainability and efficiency goals of modern aerospace design.By adhering to these specifications, engineers can ensure the safety, performance and durability of aircraft components, ensuring they perform optimally in their demanding roles.



Aerospace Specifications: The Importance of Compliance


Aerospace engineering requires tight tolerances and world-leading quality standards to maximize efficiency while maintaining aircraft safety.Therefore, components used in this field must meet strict specifications to guarantee safety, performance and durability.These specifications are often developed by various standardization bodies to ensure that parts are universally compatible and perform as expected under harsh conditions.Complying with these specifications is more than just adhering to standards; it's about ensuring the quality and reliability required for high-performance aerospace applications.


  • Aerospace standards:This designation is a designation given by SAE International to a specific standard for aerospace technology.AS standards cover a wide range of aerospace components, including threaded jackets.

  • AMS (Aerospace Materials Specification):Also managed by SAE International, AMS standards focus on materials used in aerospace, including their processes and handling.

  • NAS (National Aerospace Standard):Developed by the Aerospace Industries Association, NAS standards are typically more specific, covering detailed requirements for aerospace manufacturing processes and products.




General specification for threaded sleeves for aerospace applications


AA-59158: Threaded Jacket Insertion and Extraction Tool

Refers to tools designed for the insertion and extraction of threaded sheaths, providing the necessary equipment for maintenance and assembly operations in a variety of applications.


AS7245: CRES Procurement Specification

Covers purchasing specifications for Corrosion Resistant Steel (CRES) threaded jackets for applications requiring durability and resistance to corrosive environments.


AS7246Heat Resistant Alloy (Inconel) Purchasing Specifications

Specifies requirements for thread jackets made of Inconel, an alloy known for its excellent corrosion and heat resistance, suitable for use in high temperatures and harsh environments.


NAS1130Specifications for tailless sheaths

Description of a tailless boot that provides a permanent, wear-resistant thread in the material and eliminates the need for knotting in insertion installations, simplifying the thread-making process.


NASM122076-122275Specification for straight thread coarse threads

Outlined specifications for smooth threaded coarse thread sheaths, providing a universal solution for improving thread strength and durability.


NASM124651-124850Specification for straight thread fine threads

Defined in size with a straight thread fine thread, ideal for applications requiring precise thread engagement and high load distribution.


NASM21209Specification for self-locking coarse and fine threads

Refers to self-locking thread sheaths, including coarse and fine threads, designed to prevent loosening under vibration or pressure and ensure safe and reliable thread engagement.


Specification for surface preparation and coating of threaded inserts for aerospace applications


AMS-QQ-P-416Electroplating, cadmium (electrodeposition)

This specification covers the requirements for electrodeposited cadmium thread jackets.It has excellent corrosion resistance, especially in marine environments, and is capable of providing electrical protection to high-strength steel.


AMS2410Electroplating, silver plating, nickel plating, high temperature baking

This standard details a silver plating process in which a silver layer is deposited on a nickel strike and then subjected to a high bake to enhance adhesion and durability.This approach is particularly beneficial for components requiring excellent thermal conductivity and corrosion resistance.


AMS2411Electroplating, silver high temperature applications

Specifies requirements for high temperature resistant silver plating.This coating is ideal for joints and components that must maintain integrity and performance when exposed to high temperatures.


AMS2412Electroplating, silver plating, copper plating, low temperature baking

A silver plating process is introduced, which includes bottom copper plating using a low-temperature baking process.Copper provides excellent adhesion to silver plating, making it suitable for conductive applications where temperatures rise moderately.


AMS-C-26074Plating, electroless nickel plating

This specification outlines the requirements for electroless nickel plating that provides uniform thickness and enhanced corrosion resistance over the entire surface of the part, including interior surfaces and complex shapes.


AMS2700CRES (Corrosion Resistant Steel) Passivation

Covers the requirements for passivation of stainless or corrosion-resistant steel to enhance its corrosion resistance by removing free iron and other contaminants from the surface.


AS5272: Purchasing Specification for Lubricants, Solid Films, Thermal Curing, Corrosion Inhibition

Specify the use of a solid film lubricant which is heat curable and provides corrosion inhibition.This type of lubricant is typically used on components that require reduced friction and increased resistance to environmental factors.


Step into KATO®Kato Threaded Jackets: Aerospace Precision Engineering


KATO®Kato threaded inserts are designed to meet the stringent requirements of the aerospace industry.Known for their precision and quality, our jackets enhance the performance, reliability and durability of aerospace components to meet a variety of requirements.Kato thread jackets are designed to provide superior strength and wear resistance, ensuring each joint maintains its integrity under the extreme conditions of aerospace applications.


WHY KATO®Kato threaded sheaths stand out


  • Superior fastening performance: Kato threaded jackets improve load distribution and reduce stress concentrations, which is critical in high-vibration and high-load aerospace environments.

  • Enhanced Durability: By evenly distributing load and stress, our thread boots significantly extend the life of threaded components, preventing common failures like stripping and pullout in softer materials.

  • Innovative design: Tanged available®With tail sheath and Tangless®Tailless sheaths are available in two options. Our sheaths meet a variety of installation preferences and requirements. Tailless sheaths eliminate the critical issue of foreign debris in aerospace operations.


Meet aerospace standards


At Step Up, we understand the importance of adhering to aerospace standards to ensure safety, interoperability and quality of aerospace engineering.Our KATO® thread inserts are manufactured to meet all aerospace specifications listed above.Each product is carefully tested to meet these stringent standards, ensuring they are suitable for the specific needs of any aerospace design.


Step into KATO®Kato jacketing enhances your aircraft design and ensures compliance


Whether you are looking to optimize the performance of a commercial airliner or improve the reliability of a military aircraft, KATO® has the right thread jacketing solution.Our dedication to quality and precision makes us a trusted partner in the detail-obsessed aerospace industry.


To learn more about our products or receive additional pricing information, please contact a member of our team.




KATO ® Tanged & Tangless ® Wire Thread Inserts are manufactured by Advanex Worldwide.

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