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Old 01 June 2012, 06:10   #1
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Lowrance threads?

Am desparately trying to panel mount my plotter into a new "instrument pod" that I built.

Probem is that my aeging LM520 doesnlt seme to share it;s mount kit with much, and after a week of phoning round I was quoted almost as much for the panel mount kit as I biught the plotter for ! So, I started to fabrricate my own, and now have a small problem - the threads o nthe side of the unit for the fixing bolts are not metric.

Any of you supliers out there have what I think is a 1/4" AF threaded screw (ideally pan head, but right now anything that fits the thread) in stainless I could buy a couple of?


It does strike me that someone breaking an old Merc / Johnsorude might have something suitable? (all my spare nuts & bolts are way too big!
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Old 01 June 2012, 08:35   #2
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I think you'll find that 1/4" AF is the same thread as a camera mount on a standard tripod. Might give you a second lead on sources.
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Old 01 June 2012, 10:50   #3
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"AF" isn't the thread size, AF means "across flats" which is the spanner size that fits a particular bolt head (or nut). Your thread will probably be UNC or UNF.
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Old 01 June 2012, 12:04   #4
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1/4-20 I think. 1/4" diameter rod, 20 threads per inch. Dead standard thread size in the US. As Erin says, it's the same as a tripod.

Are you flush-mounting? An LMS-520? The Lowrance flush mount kit was a couple pieces of stainless bar, about an inch or so wide, formed into square "U"s. The first bolted to the mounting thumbrew holes, and had a couple of studs off the back. The second was longer (the legs of the U), and a touch wider, such that bolting the base of the U's together caused the legs to press against the back of the panel, pulling the unit tight against the panel front. Not really much for a $30 or so mounting kit.

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Old 01 June 2012, 12:05   #5
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Old 01 June 2012, 20:08   #6
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AF - American fine ? Either way, drink was right, i fixed my camera to the surface mount, and jky, yes that's what i tried to buy and an now 2 screws short of a homemade alternative....

I could have phrased that better!
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Old 01 June 2012, 20:13   #7
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Drink? Bl**dy predictive text... Thought i typed "Erin"...
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Old 01 June 2012, 22:14   #8
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Standard 1/4-20 is Unified National Coarse.

National Fine is 28 tpi, I think.

If you want to see some (occasionally hilarious) auto-corrects, try:
Damn You Auto Correct! - Funny iPhone Fails and Autocorrect Horror Stories

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Old 02 June 2012, 04:27   #9
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Drink? Bl**dy predictive text... Thought i typed "Erin"...
Don't worry, the two are often synonymous
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