12-24 is not that unusual, though unless space was at a premium I would just
use 1/4" fasteners in their place. My local hardware stores stock that size,
though I'm not sure about SS. McMaster Carr has SS hex heads in 3/4" for 25@$10.
Al
AB2ZY
-----Original Message-----
From: TowerTalk <towertalk-bounces@contesting.com> On Behalf Of Tom Hellem
Sent: Tuesday, February 9, 2021 1:03 PM
To: towertalk@contesting.com
Subject: Re: [TowerTalk] Ham IV part identificaiton
Those bolts do seem to be a bit hard to find.
According to Fastenal's website, they have them in stainless socket head cap
screws for around $2.50 apiece. And they say there is no inflation.
I wonder if there is enough material present to drill them out and tap them for
1/4", you can get this size bolt anywhere and cheaply.
Tom
K0SN
On Tue, Feb 9, 2021 at 10:37 AM kj6y--- via TowerTalk <
towertalk@contesting.com> wrote:
> I tried all over the internet to find those screws. I did get some
> from Hygain/MFJ. I had a brand new Ham IV on an MA-40 mounted on top
> and the screws holding the top and bottom pieces together came loose
> and the antenna fell off. Screws were not put on with Locktite. Sent
> back to Hygain for replacement. They replaced the top half and
> installed new screws. Again no Locktite. I removed and reinstalled
> the screws with Locktite. Hopefully this will keep it from happening again.
> All the
> rotors I refurbish I use Locktite on the screws. Skip Bolnick,
> KJ6YCommunications Service Cowww.kj6y.com818-522-5421 In a message
> dated
> 2/9/2021 8:19:30 AM Pacific Standard Time, marvs@att.net writes:
> Does anyone know what size bolt is used to hold the upper bell housing
> to the lower housing in a Ham IV? Marv
> K7IU_______________________________________________
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