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Thread: Torque reference chart.

  1. #1

    Torque reference chart.

    I am trying to put together a reference chart for screw torque values and had some questions. I was hoping there was something online that i could grab but it dosent seem to be the case. All fasteners are metic A4-70 and the work piece is either aluminium or SS.


    Is there a universal standard that should be followed? If so which one?
    How does loctite/threadlocker affect the K value?
    Does the recommended torque value differ depending on application - High vibration, underwater etc.


    Thank you in advance.
    Last edited by adaml_509; 05-27-2020 at 12:30 PM.

  2. #2
    Principle Engineer Cragyon's Avatar
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    There's not really a universal standard on fastener torque per fastener. But it is common to have standard torque tables in engineering design activities.

    See the following documents and webpages that will help you to develop you own torque-per-application tables.

    Fastener and Screw Torque Design and Equation and Calculator

    Fastener, Bolt and Screw Design Torque and Force Calculation

    Threaded Fastener Design and Analysis

    FYI, usually threaded inserts are used in aluminum when corrosion and torque matters.

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