Call Search
     

New to Ham Radio?
My Profile

Community
Articles
Forums
News
Reviews
Friends Remembered
Strays
Survey Question

Operating
Contesting
DX Cluster Spots
Propagation

Resources
Calendar
Classifieds
Ham Exams
Ham Links
List Archives
News Articles
Product Reviews
QSL Managers

Site Info
eHam Help (FAQ)
Support the site
The eHam Team
Advertising Info
Vision Statement
About eHam.net

   Home   Help Search  
Pages: [1] 2 Next   Go Down
  Print  
Author Topic: R390A front panel screws  (Read 9535 times)
9A5BDP
Member

Posts: 110




Ignore
« on: October 26, 2013, 01:11:33 PM »

Hi there..

I need information regarding flat head screws on front panel of R390A receiver, what is dimension of these screws?

73!

Logged
AC5UP
Member

Posts: 3875




Ignore
« Reply #1 on: October 26, 2013, 02:00:50 PM »

The depot manual describes them as " 8-32 x 3/8" binder head screws "

A more complete description would be an SAE (English measure) #8 cup head machine screw with a pitch of 32 threads per inch and the threaded portion being 3/8ths of an inch long. I recall them as Philips head stainless, the depot manual shows a beveled washer under each screw.

Here's a picture of the more common cadmium plated parts:



Stainless would be less bright in color. The depot maintenance manual can be downloaded from a variety of sites free of charge and is very, very complete.
Logged

Never change a password on a Friday                
9A5BDP
Member

Posts: 110




Ignore
« Reply #2 on: October 26, 2013, 11:25:50 PM »

Thanx for information and great photo, so next action is to find some dealer...

73!
Logged
KD0REQ
Member

Posts: 950




Ignore
« Reply #3 on: October 28, 2013, 01:49:25 PM »

if they're not in your hardware store bin, Fastenal online can oblige.
Logged
G3RZP
Member

Posts: 4623




Ignore
« Reply #4 on: October 28, 2013, 02:55:50 PM »

UNC/UNF screws are not often found in hardware stores in Europe - screws here are pretty well all metric, although some of the BSW/BSF and BA can be obtained. Some model engineering places sell UNF/UNC, but otherwise it can be a commercial minimum quantity job to get them.
Logged
9A5BDP
Member

Posts: 110




Ignore
« Reply #5 on: November 04, 2013, 11:35:08 AM »

Where to find this kind of screws in EU? I need only 5 pcs of them...

Or maybe someone of the hams from the States have some spares to donate...

73!

Dubravko from 9A
Logged
G3RZP
Member

Posts: 4623




Ignore
« Reply #6 on: November 05, 2013, 01:47:48 AM »

Look up Clerkenwell Screws, 109 Clerkenwell Road, London, EC1R 5BY.

They don't advertise their email address, but you can click on a 'send message'. I've bought small quantities from them in the past.

73

Peter G3RZP
Logged
9A5BDP
Member

Posts: 110




Ignore
« Reply #7 on: November 05, 2013, 01:14:14 PM »

Thanx a lot for this kind information...
Logged
AA4HA
Member

Posts: 1451




Ignore
« Reply #8 on: November 05, 2013, 01:38:48 PM »

There are a few hundred people who are actively engaged in maintaining, operating and modifying the R-390/ R-389/ R-390A/ R-392 radios who operate on a list;

http://mailman.qth.net/mailman/listinfo/r-390

Come join us, I bet that someone probably has a big bag of screws sitting around. (most of us have a few screws loose as it is).
Logged

Ms. Tisha Hayes, AA4HA
Lookout Mountain, Alabama
N3DT
Member

Posts: 536




Ignore
« Reply #9 on: November 08, 2013, 07:41:11 PM »

If I had any spares, I'd just send them to you.  Actually I need a set too, I'm missing a set for an R390A I have but it's not high on my priority list right now.  If you want to wait a few weeks, I'll get some.  They can't be too hard to get here in the US.  Lots of times SS screws can be found for a few bucks on Amazon if you get like 50 or so.
Logged
9A5BDP
Member

Posts: 110




Ignore
« Reply #10 on: November 09, 2013, 11:27:24 AM »

I make my registration on 390A mail list and make my first post. If I would have some luck I will manage to obtain screws from hams in other case please mr. N3DT make some notes in your shoping bag list regarding my needs..Thanx in advance
Logged
N3DT
Member

Posts: 536




Ignore
« Reply #11 on: November 21, 2013, 06:42:54 PM »

I got 100 each of 6-32 x 1/2, 8-32 x 5/8 and 8 tooth external locks all SS for $17.22.  So I sent 9A5BDP a set plus spares gratis.  I have 2 R390A's that could use new screws, so that leaves about 75 that I don't have much use for.  If anyone wants a set, I'll be glad to send a complete set of 8 each for lets say $1.50 plus shipping which shouldn't amount to even $1, so lets say $2.50?.  But I'd like to do it all at once so I don't make multiple trips to the P.O.  Let me know and I'll give it about 2 weeks and see if anyone wants a set.  If not they'll go in the nut and bolt bin.



Dave
Logged
N3DT
Member

Posts: 536




Ignore
« Reply #12 on: November 22, 2013, 06:49:42 AM »

They're all spoken for already.
Logged
KG8LB
Member

Posts: 237




Ignore
« Reply #13 on: November 23, 2013, 05:38:34 AM »

The depot manual describes them as " 8-32 x 3/8" binder head screws "

A more complete description would be an SAE (English measure) #8 cup head machine screw with a pitch of 32 threads per inch and the threaded portion being 3/8ths of an inch long. I recall them as Philips head stainless, the depot manual shows a beveled washer under each screw.

Here's a picture of the more common cadmium plated parts:



Stainless would be less bright in color. The depot maintenance manual can be downloaded from a variety of sites free of charge and is very, very complete.
Seems to add some confusion here ?  I think the OP is requesting info on the various SAE 6-32 Flat Head screws that are used on the R-390 . Flat Head screw length is the grip length below the widest part of the head .Your  Binding head reference woud seem to be for the to rack mounting 8-32 screws . The photo in your posting is indeed FLAT HEAD srews with "Cupped Trim Washers" often used together but the trim washers are best used with "Oval Head" screw types . The oval head screws are tapered seat like the flat heads but the top of the screw is crowned .
The proper lockwashers for flat head screws come with the 82 degree countersink taper already formed .
Cad plated screws are on the way out due to environmental issues but the cad plated steel screws are a bit stronger in tensile than the stainless steel type . Try to avoid BA screws as they have a slightly different thread form than the SAE form .
Logged
AC5UP
Member

Posts: 3875




Ignore
« Reply #14 on: November 23, 2013, 05:51:45 AM »

Seems to add some confusion here ?

Have you referred to the depot manual for the mechanical illustration and parts list of the front panel?
Logged

Never change a password on a Friday                
Pages: [1] 2 Next   Go Up
  Print  
 
Jump to:  

Powered by MySQL Powered by PHP Powered by SMF 1.1.11 | SMF © 2006-2009, Simple Machines LLC Valid XHTML 1.0! Valid CSS!