Howard wrote:
Hello,

I have a VHF whip that mounts to my radar pedestal. The radar is on
one side and the other is a flat plate for mounting. I was having
some trouble with the VHF (poor reception) so I took the antenna off
to check the connection. When reinstalling the mounting screw/bolt
jumped overboard.

My question: Does anyone have a clue what size scew/bolt I need?

Yes, silly question with little info, but maybe............

The boat, with the antenna, is on the hard very far away (1,000 miles)
and not readily available for inspection.

The antenna mount is such:
The base of the antenna has a threaded hole.
There is a matching hole in the aluminim mounting plate.
The coax has the outter shield stripped back and the center conductor
is terminated in a ring connector.
The coax connection is covered with heat shrink.

I bought the boat with this arrangement so I have no first hand
experience with it.

It is a whip fiberglass antenna, maybe 8' long.

The antenna has no external markings indicating make.

Sent with cautious optomisim,

Howard

I have a feeling this is a wetsuit job!

Dennis.