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APX7K Speaker Mic (HMN4104) Thumb Screw
Posted: Mon Sep 19, 2011 3:24 pm
by RADIO43
Looking for part number for just the thumb screw for the above speaker mic. I believe it is common to all the 7K Mic's and programming cables.
Thank you in advance..
radio43
Re: APX7K Speaker Mic (HMN4104) Thumb Screw
Posted: Mon Sep 19, 2011 3:53 pm
by kb0uxv
Looking for the same part number, I have had a few strip out. My Motorola dealer got replacement screws (at $15 each) and they were the "low profile" type that requires a screw driver to use.
Re: APX7K Speaker Mic (HMN4104) Thumb Screw
Posted: Mon Sep 19, 2011 6:15 pm
by Tom in D.C.
The only decent thumbscrew I've seen for the APX/TRBO speaker/mic connection came to me with a cheap-but-okay aftermarket speaker/mic. It is literally a thumb screw that you turn with your thumb and index finger and it beats the hell out of the standard Motorola attachment screw.
Re: APX7K Speaker Mic (HMN4104) Thumb Screw
Posted: Tue Oct 04, 2011 10:18 am
by kf4lhp
I called parts about this a while back, had to scavenge one out of a speaker mic for my programming cable. They couldn't locate a part number for the thumbscrew. May have to go to the Fastenal store and see what they've got.
Re: APX7K Speaker Mic (HMN4104) Thumb Screw
Posted: Wed Oct 05, 2011 11:53 am
by RADIO43
Here is what I got back from Motorola when a case was opened:
"Unfortunately we do not offer the thumbscrew as a replacement part, if it helps, I can tell you the thread type is a 4-40 UNC."
Re: APX7K Speaker Mic (HMN4104) Thumb Screw
Posted: Wed Oct 05, 2011 7:06 pm
by Fuel4300
Sounds like its time to dust off the old McMaster-Carr catalog!
http://www.mcmaster.com/#thumb-screw-fasteners/=ed7buz
Re: APX7K Speaker Mic (HMN4104) Thumb Screw
Posted: Fri Oct 14, 2011 8:21 am
by kf4lhp
Grainger part 5RA59, $2.88 each, works perfectly. Received a few this morning.
Re: APX7K Speaker Mic (HMN4104) Thumb Screw
Posted: Fri Oct 28, 2011 10:32 pm
by kb0uxv
Thanks for posting the Grainger screw, will try that.