Page 2 of 3 FirstFirst 123 LastLast
Results 16 to 30 of 33

Thread: 2420 Screws

  1. #16
    Senior Member Steve's Avatar
    Join Date
    Apr 2003
    Location
    Maui
    Posts
    126

    Allen head screws

    Aloha
    I forgot to mention that I prefer to use allen head machine screws as replacements screws. Easier to use, can actually use a torque wrench on them with an allen driver socket for consistant tightening torque on all the screws.
    The screw is easier to remove and less likely to have problems with buggered heads and screw drivers missing or slipping causing damage. The head size is usually smaller and more likely to fit the small recess hole. Works wonderful when using higher rated screws also.
    I actually use Allen head screws for all my speaker mounting when I mount my speakers. Some times I need a washer under the heads. Less likely to damage the surrounds and cones too.

    Steve

  2. #17
    Senior Member Steve's Avatar
    Join Date
    Apr 2003
    Location
    Maui
    Posts
    126

    taps.....

    Aloha
    As mentioned above earlier, clearing the threads with a tap is a great idea, probably the best way to save the threads, if they aren't already too damaged.
    There are basically 2 types of taps, Standard and Bottoming taps.
    The bottoming taps are not as tapered and will allow tapping or clearing threads to the bottom of the hole. The standard tap is a lot more tapered, as they need to be that way to start the cutting of the metal into threads. It would probably be best to use a bottoming tap, if available. I remember at one time using taps made specifically for thread straightening and cleaning. Haven't seen any thing like then for sale in a long long time.

    One trick that is used often to keep the metal cuttings from falling inside is to coat the tap in grease. That way a lot of the cuttings will stick to the grease in the side clearing cut outs on the tap. Back out the tap often after one or two turns or so to clear out the cuttings and keep them from gawling what is left of the threads.

    Another trick I have used is to take a piece of cotton or small piece of cloth, Q-tip end will work great and make it small enough to fit in the hole you are working on. Push it to the bottom. When done cutting or clearing the threads, Use a vacum cleaner with a small hose attached to the end, I haved used a funnel on the end of the hose , and vacum out the hole, then use a small pair of tweezers to pull out the plug ifthe vacum won't pull it out. Be sure you can reach the plug before you clear the threads so you won't push it to a point you can't get it out. Be sure not to push the plug out of the threads too. Measure the distant and mark the tap. If there is more threads to tap just at the point of where the plug was, clear the threads to the plug, pull the plug, then finish the last bit.

    Another trick I use...I apply a very small dab of anti-seize compound to the threads of the screw so they won't seize up later on.

    The screw you install, be sure it is a rating of 3 or above....I prefer a rating of 5...
    That way the screw is tough enough in case it does get stuck, it won't twist the head off and warrant drilling out the old screw.

    If the threads are way too messed up, tap the hole one size bigger.
    Be sure the thread pitch is correct also.

    Hope it works out.
    Steve

  3. #18
    Senior Member Fangio's Avatar
    Join Date
    Oct 2005
    Location
    Germany
    Posts
    789

    not 2420 but 2307 screws wanted

    Quote Originally Posted by Guido
    1/4-20 means
    diameter is 1/4 inch (approx. 6mm)
    20 is the number auf "windings" on an inch

    1-1/4 means the screw is 1 1/4 inch (approx. 3,18cm) long.

    I hope this helped.

    I got them from German Wuerth. You have Wuerth in France too.
    I'm looking for a fistful inch screws to mount the 24xx/23xx combo to JBL monitor baffles. They should have 1/4" x 1-1/4", countersink heads with cross slot, and be black of course. The winding is called UHF here I believe.

    Living in a millions city one should think that would be easy to find. But I haven't been lucky yet, inch screws aren't common in the usual screwdealers shelfs here, and not even in internet shops. I've digged through the archives how other europeans solved this and of course - one thread came up. Asked the local Wuerth office but they said no, not available. The only dealer I could find would order at least 100 in UK, for 40€ plus s/h.

    Would someone please be so kind to point me to a dealer or direction where these can be had in smaller quantities than 100 these days, lets say 20. Thank you.

  4. #19
    Administrator Mr. Widget's Avatar
    Join Date
    Apr 2003
    Location
    San Francisco
    Posts
    9,719
    Quote Originally Posted by Fangio
    I'm looking for a fistful inch screws....
    Would getting bright zinc screws be any easier for you? Remember John's discovery?

    http://www.audioheritage.org/vbullet...ad.php?t=11782

    If getting any inch screws is a problem, let me know by PM and I'll send you a fist full of 1/4-20s.


    Widget

  5. #20
    Senior Member Fangio's Avatar
    Join Date
    Oct 2005
    Location
    Germany
    Posts
    789

    Thumbs up Widgetworks

    Perfect, thank you very much. And
    Attached Images Attached Images  

  6. #21
    Obsolete
    Join Date
    Apr 2003
    Location
    NLA
    Posts
    12,193
    Speaking of nuts, bolts, screws, washers; Another option may be to see if these guys have what you want. I don't shop around much and usually just get on their website and order a hundred or so of whatever I need.

    Aaron’s General Store

  7. #22
    Senior Member Steve's Avatar
    Join Date
    Apr 2003
    Location
    Maui
    Posts
    126
    Aloha Giskard

    Thank you for the link.

    Steve

  8. #23
    Member
    Join Date
    Apr 2014
    Location
    Germany
    Posts
    37
    Sorry for resurrecting this stone age thread, but I am working on a pair of a pair of 2482 with massively abused cap screws.
    My first guess concerning the thread was 10-24 UNC - definitely wrong. Does anybody know better?
    Name:  screwed2.jpg
Views: 424
Size:  63.2 KB
    Regards: Holger

  9. #24
    Administrator Mr. Widget's Avatar
    Join Date
    Apr 2003
    Location
    San Francisco
    Posts
    9,719
    I'm not sure and my remaining LE85s are still "red wax intact", but I think they are 10-32 filister screws.

    Here is an old thread on the topic of screws: http://www.audioheritage.org/vbullet...king-for/page2


    Widget

  10. #25
    Member
    Join Date
    Apr 2014
    Location
    Germany
    Posts
    37
    So 10-32 x 2" UNF seems to be the way to go.
    Thank you very much.
    Regards: Holger

  11. #26
    Senior Member BMWCCA's Avatar
    Join Date
    Feb 2006
    Location
    Virginia
    Posts
    7,742
    Can you find a soldier in the motor pool with a tap and dye set? Use his thread gauge to measure the good part of what's left. I'm not sure you have enough meat on the bone to run the thread dye through there and do any good. Anyone in Germany who works on American cars for fun should have the thread gauge and tools you need to verify. Good luck.
    ". . . as you have no doubt noticed, no one told the 4345 that it can't work correctly so it does anyway."—Greg Timbers

  12. #27
    Member
    Join Date
    Apr 2014
    Location
    Germany
    Posts
    37
    The problem's not the thread, but the heads. They are completely wrecked. I was lucky to get them out at all without drilling them.
    Regards: Holger

  13. #28
    Senior Member BMWCCA's Avatar
    Join Date
    Feb 2006
    Location
    Virginia
    Posts
    7,742
    Quote Originally Posted by .:hb:. View Post
    The problem's not the thread, but the heads. They are completely wrecked. I was lucky to get them out at all without drilling them.
    That's a shame.

    The threads don't look that hot, either!
    ". . . as you have no doubt noticed, no one told the 4345 that it can't work correctly so it does anyway."—Greg Timbers

  14. #29
    Senior Member
    Join Date
    Apr 2016
    Location
    san diego
    Posts
    315
    since you guys are talking about screws, what size are the mounting screws for the H91 horns? 4 countersunk screws for the front..
    Semper Fidelis

  15. #30
    Member
    Join Date
    Apr 2014
    Location
    Germany
    Posts
    37
    That's 1/4-20 UNC, 1" length.
    Regards: Holger

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. 2420 on 4430
    By gerard in forum Lansing Product General Information
    Replies: 1
    Last Post: 10-24-2004, 06:51 PM
  2. Some screws needed...help
    By Hofmannhp in forum Lansing Product Technical Help
    Replies: 3
    Last Post: 08-12-2004, 09:26 PM
  3. Help, Need to Design a 2420 Xover
    By Chas in forum Lansing Product Technical Help
    Replies: 10
    Last Post: 11-24-2003, 08:09 AM
  4. Replace 2420 foam pads?
    By Tom Loizeaux in forum Lansing Product Technical Help
    Replies: 7
    Last Post: 05-13-2003, 06:32 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •