Repairing speakers

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GramKracka
GramKracka Posts: 8
in Vintage Speakers
I have a pair of monitor 70s series 2. I had them in storage for a little bit and I've noticed that the screws that hold the woofers into the cabinet have rusted. Anyone know what kind of screws these are and where I can get some? TIA
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  • F1nut
    F1nut Posts: 49,825
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    Remove one screw and post a few photos of it.
    Political Correctness'.........defined

    "A doctrine fostered by a delusional, illogical minority and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a t-u-r-d by the clean end."

    President of Club Polk

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  • GramKracka
    GramKracka Posts: 8
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    Here are some picturesllbnfv1zvkea.jpg
    aja31r8tsleq.jpg
    a2ufbxpt9xf5.jpg
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  • pitdogg2
    pitdogg2 Posts: 24,604
    edited April 2
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    those do not look too bad, I've seen a lot worse. Clean them off with a wire brush.
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  • GramKracka
    GramKracka Posts: 8
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    That was one of the better ones. There are some that are far worse
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  • Gardenstater
    Gardenstater Posts: 4,195
    edited April 2
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    I see them on amazon but they seem to be in metric sizes. You will need to measure the ones you have with whatever means you have. A dial caliper would be ideal.

    https://www.amazon.com/Hexagon-Socket-Tapping-Stainless-Speaker（100/dp/B09M9WR756?th=1

    ^Good luck telling that China seller exactly what diameter you want. Seems to be no way I can see lol.

    Parts Express has some sizes:

    https://www.parts-express.com/search?keywords=cap head wood screws
    George / NJ

    Polk 7B main speakers, std. mods+ (1979, orig owner)
    Martin Logan Dynamo sub w/6ft 14awg Power Cord
    Crown D150 amp
    Logitech Squeezebox Touch Streamer w/EDO applet
    iFi nano iDSD DAC
    iPurifier3
    iDefender w/ iPower PS
    Custom Steve Wilson 1m UPOCC Interconnect
    iFi Mercury 0.5m OFHC continuous cast copper USB cable
    Custom Ribbon Speaker Cables, 5ft long, 4N Copper, 14awg, ultra low inductance
    Custom Vibration Isolation Speaker Stands and Sub Platform
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  • F1nut
    F1nut Posts: 49,825
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    Those are self tapping socket cap screws. No idea what size you have, so you'll have measure one. Likely a metric size.

    Here are some examples.
    https://www.rtlfasteners.com/RC/mm.html
    Political Correctness'.........defined

    "A doctrine fostered by a delusional, illogical minority and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a t-u-r-d by the clean end."

    President of Club Polk

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  • GramKracka
    GramKracka Posts: 8
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    Thank you for the link
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  • Gardenstater
    Gardenstater Posts: 4,195
    edited April 2
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    This one has ability to specify exact size you want to order:

    https://www.amazon.com/dp/B0CR8M4TBV/ref=sspa_dk_detail_0

    M4 x 20 would be my "guess"
    George / NJ

    Polk 7B main speakers, std. mods+ (1979, orig owner)
    Martin Logan Dynamo sub w/6ft 14awg Power Cord
    Crown D150 amp
    Logitech Squeezebox Touch Streamer w/EDO applet
    iFi nano iDSD DAC
    iPurifier3
    iDefender w/ iPower PS
    Custom Steve Wilson 1m UPOCC Interconnect
    iFi Mercury 0.5m OFHC continuous cast copper USB cable
    Custom Ribbon Speaker Cables, 5ft long, 4N Copper, 14awg, ultra low inductance
    Custom Vibration Isolation Speaker Stands and Sub Platform
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  • GramKracka
    GramKracka Posts: 8
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    The whole screw is an inch long and takes a 3mm allen wrench.
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  • F1nut
    F1nut Posts: 49,825
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    One inch is 25mm. You need the measurement of the threaded area not including the head, so I'm guessing the threaded area is 20mm (3/4") long.
    Metric screw diameters are noted as M4, M6, M8, etc. Chances are yours are M4 or M6.
    Political Correctness'.........defined

    "A doctrine fostered by a delusional, illogical minority and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a t-u-r-d by the clean end."

    President of Club Polk

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  • odcics2
    odcics2 Posts: 309
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    Take it your local hardware store.
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  • F1nut
    F1nut Posts: 49,825
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    odcics2 wrote: »
    Take it your local hardware store.

    Good luck with that...lol
    Political Correctness'.........defined

    "A doctrine fostered by a delusional, illogical minority and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a t-u-r-d by the clean end."

    President of Club Polk

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  • GramKracka
    GramKracka Posts: 8
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    Yeah I've gone to 3 hardware stores with no luck
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  • joebass3
    joebass3 Posts: 252
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    I'd take them to the wire wheel, poke them through a piece of cardboard, dust a little black paint on the heads and call it a day.
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  • VR3
    VR3 Posts: 28,067
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    Do you have advice on where to buy black paint?
    - Not Tom ::::::: Any system can play Diana Krall. Only the best can play Limp Bizkit.
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  • halo71
    halo71 Posts: 4,573
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    VR3 wrote: »
    Do you have advice on where to buy black paint?

    damnit....you beat me to saying that!
    --Gary--
    Onkyo Integra M504, Bottlehead Foreplay III, Denon SACD, Thiel CS2.3, NHT VT-2, VT-3 and Evolution T6, Infinity RSIIIa, SDA1C and a few dozen other speakers around the house I change in and out.
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  • michaeljhsda2
    michaeljhsda2 Posts: 2,176
    edited April 5
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    Naval jelly will remove the rust.

    https://www.homedepot.com/p/reviews/Loctite-Naval-Jelly-16-fl-oz-Rust-Dissolver-553472/203009241/1
    SDA SRS 2.3TL's
    Silk Audio MS-90-BT integrated tube amp
    Yaqin MS-20L integrated tube amp
    SDA 2B TL's
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  • VR3
    VR3 Posts: 28,067
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    halo71 wrote: »
    VR3 wrote: »
    Do you have advice on where to buy black paint?

    damnit....you beat me to saying that!

    My advice to up your game is to have a baby and that way you don't sleep... Ever

    😅👀
    - Not Tom ::::::: Any system can play Diana Krall. Only the best can play Limp Bizkit.
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  • Toolfan66
    Toolfan66 Posts: 16,936
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    If you're replacing all the screws, they don't necessarily need to be a socket head screw as long as the thread is the same, and the head has a good base..
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  • mhardy6647
    mhardy6647 Posts: 33,066
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    michaeljhsda2 wrote: »
    Naval jelly will remove the rust.

    https://www.homedepot.com/p/reviews/Loctite-Naval-Jelly-16-fl-oz-Rust-Dissolver-553472/203009241/1

    Does it matter whose navel it comes from?
    Askin' for a friend. :|
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  • odcics2
    odcics2 Posts: 309
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    F1nut wrote: »
    odcics2 wrote: »
    Take it your local hardware store.

    Good luck with that...lol

    Mid-States Bolt and Screw can hook you up. Send them a pic and dimensions.
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  • michaeljhsda2
    michaeljhsda2 Posts: 2,176
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    mhardy6647 wrote: »
    michaeljhsda2 wrote: »
    Naval jelly will remove the rust.

    https://www.homedepot.com/p/reviews/Loctite-Naval-Jelly-16-fl-oz-Rust-Dissolver-553472/203009241/1

    Does it matter whose navel it comes from?
    Askin' for a friend. :|

    It's jelly from the Navy not from someone's navel.
    SDA SRS 2.3TL's
    Silk Audio MS-90-BT integrated tube amp
    Yaqin MS-20L integrated tube amp
    SDA 2B TL's
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  • F1nut
    F1nut Posts: 49,825
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    odcics2 wrote: »
    F1nut wrote: »
    odcics2 wrote: »
    Take it your local hardware store.

    Good luck with that...lol

    Mid-States Bolt and Screw can hook you up. Send them a pic and dimensions.

    That's not a local hardware store. George and I already posted links to places to buy the screws.
    Political Correctness'.........defined

    "A doctrine fostered by a delusional, illogical minority and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a t-u-r-d by the clean end."

    President of Club Polk

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  • odcics2
    odcics2 Posts: 309
    edited April 5
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    F1nut wrote: »
    odcics2 wrote: »
    F1nut wrote: »
    odcics2 wrote: »
    Take it your local hardware store.

    Good luck with that...lol

    Mid-States Bolt and Screw can hook you up. Send them a pic and dimensions.

    That's not a local hardware store. George and I already posted links to places to buy the screws.

    He said his local hardware stores were useless. I posted an alternative that helped me a lot restoring 60s vintage equipment.
    Trying to be helpful. That ok??
    Post edited by odcics2 on
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  • TennMan
    TennMan Posts: 1,264
    edited April 6
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    VR3 wrote: »
    Do you have advice on where to buy black paint?
    I was going to suggest Sherwin-Williams but decided I had better call to make sure they had it in stock. I called and asked if they had black paint that would be good to use to paint the heads of screws. They told me the only way they could tell me for sure is if I could tell them the size of the screws. Go figure...
    Post edited by TennMan on
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  • mrbigbluelight
    mrbigbluelight Posts: 9,287
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    That makes sense as black paint comes in different sizes.

    Sal Palooza
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  • msg
    msg Posts: 9,471
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    pitdogg2 wrote: »
    those do not look too bad, I've seen a lot worse. Clean them off with a wire brush.
    michaeljhsda2 wrote: »
    Naval jelly will remove the rust.
    Yes, this, and dry them with Bellybutton Lint.

    Yeah, I agree, even if they're rustier. As long as it's just surface rust and not full-on corroded, cleaning them and then coating with 3-in-1, chain & cable lube, or maybe even 2WD.

    To me, that would be more enjoyable and less hassle than trying to find fasteners. Not to mention, keeps them original.

    Timely note about Naval Jelly @michaeljhsda2 - I've got another project that I'm curious to try that on now. I think I once tried it years ago, though, and it didn't do anything for rust.

    PS - I always read your name as MichaelJihad2. I'm sure MichaelJihad1 was taken.

    I disabled signatures.
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