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The Dynaco Tube Audio Forum

Dedicated to the restoration and preservation of all original Dynaco tube audio equipment - Customer support for Tubes4hifi VTA tube amp and preamp kits and all Dynakitparts.com products


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    Bolt & Screw Sizes

    mazeeff
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    mazeeff


    Posts : 155
    Join date : 2014-01-06
    Age : 69
    Location : Grand Rapids, Michigan, USA
    • Post n°1

    Bolt & Screw Sizes Empty Bolt & Screw Sizes

    Post by mazeeff Sun Sep 13, 2015 7:54 pm

    Can someone give me the sizes of the following hardware, for a ST-70 chassis?

    1. Bolts to hold down both output and power transformers. Looks like 8-32, but not sure of length or head type.

    2. Screws to attach cage to chassis. Looks like a #6 self drive sheet metal screw. Is this correct?

    Thanks,

    Mike
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    evoroadster
    evoroadster
    evoroadster


    Posts : 45
    Join date : 2015-06-16
    Age : 74
    Location : Honolulu, Hawaii
    • Post n°2

    Bolt & Screw Sizes Empty Re: Bolt & Screw Sizes

    Post by evoroadster Sun Sep 13, 2015 8:58 pm

    I just now finished mounting new output and power transformers into a SCA-35 chassis.  I used 8-32 1/2" long machine screws. Don't forget the star washers under the nuts.
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    Bob Latino
    Bob Latino
    Bob Latino
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    Posts : 3262
    Join date : 2008-11-26
    Location : Massachusetts
    • Post n°3

    Bolt & Screw Sizes Empty Re: Bolt & Screw Sizes

    Post by Bob Latino Sun Sep 13, 2015 9:24 pm

    mazeeff wrote:Can someone give me the sizes of the following hardware, for a ST-70 chassis?

    1. Bolts to hold down both output and power transformers. Looks like 8-32, but not sure of length or head type.

    2. Screws to attach cage to chassis. Looks like a #6 self drive sheet metal screw. Is this correct?

    Thanks,

    Mike

    Yes - The transformer screws are all 8-32 screws. On a stock Dynaco ST-70 chassis the screws that hold on the bottom cover and the tube cage are #6 sheet metal screws. On all the VTA amps those screws are 6-32 stainless steel machine screws. The screws to hold on the tubes sockets and all the front face and rear face gear are 4-40 pan head screws.

    Bob
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    mazeeff
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    mazeeff


    Posts : 155
    Join date : 2014-01-06
    Age : 69
    Location : Grand Rapids, Michigan, USA
    • Post n°4

    Bolt & Screw Sizes Empty Re: Bolt & Screw Sizes

    Post by mazeeff Mon Sep 14, 2015 4:25 am

    Thanks for the quick responses.

    Mike
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