Need HELP with 802-8d and 288-16k

[Barossi]

Hi,

i need new screws for the 802-8d and 288-16k:

-screws for diaphragm
-screws diaphragm cap

Could you please tell me the srew length and the size. Here we have the metric system.

Greetings Barossi

[Jim D]

For the 802---

All screws are USS thread 6/32. If you have a loading cap, the diaphragm holding screw length, less screw head, is 7/8". If you have no loading cap, it's 5/8". The screws to hold the cover on are 3/4". For the diaphragm holding screws use something non magnetic like Stainless Steel or Brass. I prefer Stainless with a Phillips type head, in fact I would use stainless for all the screws, besides, they look nice.

For the 288--

Again the diaphragm holding screws are 6/32. I am guessing, but I think they are 3/4" long. Again I would use stainless. The G and later 288s use 4 10/32 screws to hold on the cover. As I remember, the K, L, 299 screws are 1 1/4" long, the Gs are 1" long. The drivers came with black anodized hex head cap screws. Again I prefer stainlesss, they don't rust.

Hope this helps, JIM

[Barossi]

Hi Jim,

i could not find 6/32 screws.
What i could find here in Germany is the following:

http://www.online-schrauben.de/isroo...20Beschreibung

What should i do?

Greetings Barossi

[gvasale]

looking at the link, it seems to me that 1 inch long 6/32 screws are available. Last chart. see size 6, shows 6/32 and 6/40. Or are you tellin us that you could find only the chart? Seems to me someone here could mail some over.

[gvasale]

Forgot to add, the filister head (if I spelled it right) is not very common except in OEM situations. Round heads look ugly in this case, but socket heads are probably the best.

[Jim D]

Actually,

I would not use slot head screws, be they phillister or round heads. The magnets, especially in the 288 are very strong and can pull you screw driver into the diaphragm quite easily. With a slot head , the magnet can slide the screwdriver head right out of the slot. Always use both hands on the screwdriver, one on the handle, the other on the shaft right above the bit. I learned this the hard way, rather expensive..

The 802 does not care which screw head you you use, regular round heads with a phillips head work fine. On the new 288 diaphragm, one needs a narrower head screw, similar to a phillister. If you have a bench grinder, it's easy to spin round heads and take off the edge. The screws have to fit in between the ridges on the diaphragm ring. Older 288 diaphragms don't care.
Whatever you do, don't use steel screws. On 288s, I have seen loose screws literally jump out of the screw hole and land in the tangent pleats, destroying the diaphragm.
Here, in the US it's easy to get the 6/32s. Often times we cannot get the right length so we cut them off by using the screw cutters on wire stripper/terminal crimper. Don't know if you can find an "American" one of these there either. Here it's easy to get USS or Metric. I bet all the right screws here cost less than a dollar. I feel for your frustration, do you have any friends on a US Military base? . JIM

[bfish]

Originally posted by Barossi:
Hi Jim,

i could not find 6/32 screws.
What i could find here in Germany is the following:

http://www.online-schrauben.de/isroo...20Beschreibung

What should i do?

Greetings Barossi

<font size="2" face="Verdana, Helvetica, sans-serif">On your linked chart, the entry "Nr.6" is what we call a 6/32. If those aren't available, the nearest metric equivalent is M3.5 x .06 thread, which isn't identical, but worth a try (by hand).

Parts-chasing can be frustrating to me at times, I can't imagine not being able to get the odd hardware down at the local store, I feel for you, dude....