What is BS 3F 70 - Heavy duty braided rubber cord about?  
BS 3F 70 is a British guideline on heavy duty braided rubber cord. BS 3F 70 specifies requirements for heavy duty braided rubber cords in nine sizes from 5 mm to 26 mm in diameter. 
BS 3F 70 guidelines outline about cords are suitable, when cut up into unit lengths, for the manufacture of shock absorber cord assemblies and for other aeronautical purposes.
NOTE 1 - The titles of the publications referred to in this standard are listed on the inside back cover.
NOTE 2 - The latest revision of an Aerospace Series standard is indicated by a prefix number.
 Who is BS 3F 70 - Heavy duty braided rubber cord for?  
BS 3F 70 on Heavy duty braided rubber cord is useful for: 
- Aerospace, aeronautical, and defence industry  
- Manufacturers of aerospace equipment and components  
- Manufacturers of cords  
- Product design engineers 
- Quality control personnel  
Why should you use BS 3F 70 - Heavy duty braided rubber cord? 
Heavy duty braided rubber cord are used in the aerospace industry because they have high tensile strength and can be handled easily. BS 3F 70 provides you with the required characteristics of construction, diameter, rubber thread, braiding, and mechanical properties. As a manufacturer, this assists in the production of heavy duty braided rubber cord  of high quality and durability.  
BS 3F 70 assists you in improving the quality of heavy duty braided rubber cord  by including all the qualities that make them best for use in aircraft.  With compliance and obedience to BS 3F 70, you can demonstrate the reliability of your heavy duty braided rubber cord  and build trust in their use throughout the aerospace supply chain.  
What’s changed since the last update?
BS 3F 70:1991 supersedes BS 2F 70:1983 which is withdrawn. BS 3F 70:1991 includes some technical change with respect to BS 2F 70:1983. It includes:
- Number of coloured threads
