Should we start a left hand thread post?

[bonneyman]

My recent adventures made me think perhaps reverse threads are more common than I think. Maybe we should list those applications we run into and make it a reference. What do you all think?

The "lefty hefty, righty lighty" threads I know of are:
Newer water heater gas valve thermocouple leads (American brand heaters it seems)
Drill chuck attachment screws
Bicycle cranks and pedals (I'll have to check and see which is which now) P.S. Finally had to swap out a pair of pedals. Reverse thread on the pedals is the non-drive side.

[geneg]

driver's side wheel studs on 60's Chrysler products

[DeadNutz]

Isn't a Skilsaw blade bolt left hand thread?

[highland512]

Blade bolt on all gas powered saw's.

[stokester]

driver's side wheel studs on 60's Chrysler products

Ha!  I learned that lesson trying to help my Dad change the tire on our '67 Newport - broke the stud.

[oldnslo]

Ohhh.....I thought this was about left handed tools. Was I wrong?

I submit my left handed scissors gifted to me from my mom as a young child, who (though she knew I was a lefty), I chose to operate scissors with my right hand.

Yes, I still have those "painful to operate in the wrong hand" scissors.

[muddy]

I've often found even when designated as "left hand" tool usually are actually a pain for us lefties.

Sent from the twisted mind of the mudman

[bonneyman]

I don't know if it means anything, but most rifles I've seen seem to be designed for right handed people. Empty casings typically eject out the right side. A lefty shooting such rifles will have the casing elected right near their faces. Not a good thing in war when the primary weapon is odd to use by 10% of the people.   

[fatfillup]

The bulkhead nuts we use on water tanks are left handed thread. They are also asymmetrical, the nut will only go on one way.  Took me a few times to figure that out

[DeadNutz]

I don't know if it means anything, but most rifles I've seen seem to be designed for right handed people. Empty casings typically eject out the right side. A lefty shooting such rifles will have the casing elected right near their faces. Not a good thing in war when the primary weapon is odd to use by 10% of the people.   

My brother did everything right handed except shooting a rifle. I believe it had to do with his left eye being the dominant eye. My parents bought him a left handed Remington 30-06 for deer hunting.

[stokester]

If I remember right the connectors on an acetylene tank are all LHT.

[muddy]

I don't know if it means anything, but most rifles I've seen seem to be designed for right handed people. Empty casings typically eject out the right side. A lefty shooting such rifles will have the casing elected right near their faces. Not a good thing in war when the primary weapon is odd to use by 10% of the people.   

My brother did everything right handed except shooting a rifle. I believe it had to do with his left eye being the dominant eye. My parents bought him a left handed Remington 30-06 for deer hunting.

Yep I'm right eye dominant so I shoot right handed. Might also just be because it's how I was taught because I use left handed fishing reels..... I don't really remember I'll have to ask dad how we can the the conclusion of right hand shooter.

Sent from the twisted mind of the mudman

[slip knot]

If I remember right the connectors on an acetylene tank are all LHT.

All acetylene connections are even the hoses. Some propane tanks are as well.

[jeffmoss26]

the cutting wheels on key machines are reverse thread!

[Davethorik]

Some surface grinder wheels are held on the arbor with a LH nut.
In addition to Chryslers mentioned above, International had some LH wheel studs also.

[J.A.F.E.]

A lot of the spinners on knock off wheels are left hand threads on two of the wheels.

[bonneyman]

Some surface grinder wheels are held on the arbor with a LH nut.
In addition to Chryslers mentioned above, International had some LH wheel studs also.

So, is this info in a manual somewhere, or is it things you just have to learn as you go?

I've done some research on the thermocouple that I replaced, and there it is - right in the service literature. Never in 30+ years of service work on furnaces and water heaters have I run across reverse threads on a thermocouple fitting. Very specific routing of the thermocouple lead, a particular clip in a certain spot, and no bending for installation except near the nut end. Weirdest thing I've ever seen. 2004 WH - first time I've had to replace the T-couple.
I haven't been able to find out why they used such a weird thermocouple. I'm hoping the universal one I installed is acceptable - I'm checking constantly for overheating and other signs of malfunction. I hope them putting a reverse thread fitting on it was just to prevent the use of a non-OEM thermocouple.

[Rural53]

Threads on the rock bolts we installed last year on a job. A pain in the proverbial now, 12 months later with the scaffolding removed, and I need to get the abseiling contractors to check the torque on the nuts and they can't just use a torque wrench!

[skfarmer]

Left hand threads on the left opener disc on my grain drill, John Deere 455.

I know. I had to replace one today.

[eborcim]

Nut holding the pulley to a drill press spindle.

[oldnslo]

Working on my HK Porter bolt cutter (USA) the bolts holding the 2 cuttings jaw pivots, has one bolt that is LH, one is RH threaded.