ISO 9736:2000

Overview

ISO 9736:2000 specifies the characteristics of threaded steel eye-ends intended for the turnbarrels of aircraft control wire rope. The standard covers eye-ends manufactured in either low-alloy steel or corrosion-resistant steel, and defines configuration, dimensions, loads and marking requirements necessary for use in aerospace control systems.

Key deliverables of the standard include a figure showing the required configuration and a table (Table 1) listing the applicable dimensions, mass and minimum breaking loads. The document also sets out material codes, surface treatment options and designation rules to ensure consistent identification and interchangeability.

Key Topics

• Scope and purpose: Eye-ends for aircraft control cable turnbarrels, emphasizing compatibility with preformed steel wire rope.
• Configuration and dimensions: Detailed illustration (Figure 1) and Tabular data (Table 1) specify dimensions, thread forms and nominal diameters; dimensions are expressed in millimetres.
• Loads and masses: Minimum breaking loads and component masses are provided to support selection and structural verification.
• Materials: Two material families are defined:
  • Code A: corrosion-resistant steel (stainless), with allowable surface treatments (passivation, shot peening).
  • Code B: low-alloy steel, typically requiring cadmium plating where specified.
• Surface treatments: Passivation (ISO 8074) or shot-peening for corrosion-resistant steel; cadmium plating options for low-alloy steel per the annex guidance.
• Designation and marking: A standardized identity block is required on each eye-end; thread direction codes (R = right, L = left) and manufacturer identification are mandatory.
• Normative references: The standard references related aerospace standards such as ISO 2020-1 (wire rope), ISO 5855-2 (thread MJ limits), ISO 10955 (specification format) and others.

Applications

ISO 9736:2000 is intended for aerospace engineers, procurement specialists and manufacturers involved with:

• Selection and specification of control cable fittings for aircraft flight control systems.
• Ensuring interchangeability and traceability of threaded eye-ends across suppliers.
• Structural and safety assessments where component dimensions and minimum breaking loads must be known.
• Corrosion control and surface-treatment decision-making for service life and maintenance planning.

Benefits include standardized identification, predictable mechanical performance and clearer cross-reference to material and surface-treatment equivalences.

Related Standards

ISO 9736:2000 is part of a family of aerospace mechanical components standards. Key related documents include:

• ISO 2020-1 - Preformed steel wire rope for aircraft control (dimensions and loads).
• ISO 5855-2 - MJ thread limits for screws and nuts used in aerospace fittings.
• ISO 8074 - Surface treatment and passivation for stainless steel components.
• ISO 10955 - Specifications for cable end fittings and turnbuckles.

Annex A of ISO 9736 provides normative correspondence between European and US material/treatment standards (EN, SAE, QQ-P-416) to assist global procurement and compliance.

Keywords: ISO 9736:2000, eye-ends, aircraft control wire rope, threaded, steel, dimensions and loads, corrosion-resistant, cadmium, passivation, turnbarrel.