They use a square nut because of the way the nut is held place with vertical
channel in the casting, so that one does not have to use a wrench to hold
the nut. A hex not would not work with this type of design and would spin,
plus you can not fit a wrench in between the channel.
This is not easy to describe, but hopefully you can understand how it works.
Mike, K6BR
-----Original Message-----
From: towertalk-bounces@contesting.com
[mailto:towertalk-bounces@contesting.com] On Behalf Of Roger (K8RI)
Tom Menas wrote:
> The pinning bolt on my G2800-series rotor failed and neither the nut nor
bolt are to be found near the tower.
>
> Yaesu shipped me the M8 x 95mm socket head cap bolt that I need. But the
matching M8 metric nut is on backorder (ETA 6 - 8 weeks).
>
> Does anyone have one or two M8 square nuts that they could sell (or loan
me until my back order is filled)? Tnx.
>
>
My question is, why would any one use a square nut except to save a few
pennies? We used to call them "farmer bolts" as so much of the stuff
used in tractors and wagons used square nuts and bolt heads and they
were always considered "cheap". Of course there may be other reasons for
"square nuts" other than cheap. I'd put a lock washer on it and go with
a hex nut. The only duty the nut serves is to keep the bolt in place.
OTOH the bolt should be of a specific grade (hardness and strength) and
the proper size, particularly when used as a shear pin.
Another thing to check when replacing one is the holes. They should
still be round and a snug fit on the bolt. Ideally a bolt like this
should fit *tight* in the holes in the mast and rotator.
73
Roger (K8RI)
> 73, Tom, K3WT
>
>
>
> _______________________________________________
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>
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