Re: [FWDLK] Fw: Left hand lug nuts

[John McCann <jmccann02@xxxxxxxxxxx>]

Acetylene ignites if it's pressure exceeds a very low pressure I believe is
in the mid twenty pound area, it is stored in the tank at around three
hundred pounds by using a spongy material and adding acetone to raise the
flash point. I am doing this from memory from classes I took in the sixties
and seventies so I may be a little off but I think I am pretty close. If
the threads were the same and the tanks were reversed the pressure that is
used for the oxygen would exceed the flash point of the acetylene and cause
an explosion when it was turned on.
        John


> [Original Message]
> From: David Charles Gedraitis <dcg@xxxxxxx>
> To: <L-FORWARDLOOK@xxxxxxxxxxxxx>
> Date: 3/31/2003 7:39:26 PM
> Subject: Re: [FWDLK] Fw: Left hand lug nuts
>
> The propane tank has left handed threads because all flammable gases gases
> have left-handed threads. I don't know why this is, but I'm told it's to
> keep one from messing up too badly when you have multiple tanks that go
> together-if they had the same threads the regulators could go on backwards
> and you'd get the entirely wrong mixture. Anyone have any thoughts on
> that?
>
> ~dave
>
> On Mon, 31 Mar 2003, fins59 wrote:
>
> > The arbor screw holding the saw blade on my compound miter saw has left
handed threads and the bolt holding the blade on my radial arm saw has left
handed threads.   Also your propane tank for your gas grill has a left
handed thread. I can understand why the saws have them but why propane
tanks?    (My '61 Willy's Jeep also has lefthanded lugs on drivers side)
John Z
> >   ----- Original Message -----
> >   From: Ron Vest
> >   To: L-FORWARDLOOK@xxxxxxxxxxxxx
> >   Sent: Monday, March 31, 2003 12:33 PM
> >   Subject: Re: [FWDLK] Fw: Left hand lug nuts
> >
> >
> >
> >   Wayne & Jim,
> >   I used to run a manufacturing plant where we provided parts to G.E.
(Jet Engine Division), Pratt & Whitney, (Jet and Piston Engines), Rolls
Royce Engines, Hawker Siddeley, Bell Helicopter, Sikorsky, North American
Aviation, Thiokol, United Aircraft Ltd, and most all Gear/transmission
manufacturers.
> >   I can tell you unequivocally, left hand threads are very common, and
in VERY high quality applications. The examples I have given here are the
highest quality of mechanical components known to man ... NO exaggeration!
> >   Ron ...
> >
> >
> >   In a message dated 3/31/2003 12:12:48 PM Central Standard Time,
wgraefen@xxxxxxxxxxxxxx writes:
> >
> >
> >
> >     ----- Original Message ----- From: Jim McMullan
> >     Sent: Monday, March 31, 2003 12:00 PM
> >     Subject: RE: [Chrysler300] Left hand lug nuts
> >
> >
> >
> >     So the guy has not seen application where left hand threads were
required! He should to talk to G.E. or Prat & Whitney or
Westinghouse.-Rolls Roice ect. When you are assembling turbines whit
rotating masses that way over 800 lbs you torque the nuts up to 3000 lbs
foot and stretch them 100 degres.And yes some are left hand.The torque and
stretch are called out in the book and you better pay attenshion.Feel free
to forward to list.Jim McMullan 300F
> >
> >
> >
> >
> >
>
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