Left hand threads thread- Where & On what have you found them?

[pancho400cid]

that made my day

Knock ofs wheel hubs on the left side of Jaguars, Ferrari's etc.

 

[kbs2244]

If your 20 inch window fan has a screw on blade it is left hand thread.

 

[Mbsk01]

Muzzle end of an AK.

 

[72Wagon]

Some turbo charger compressor wheels

 

[Pen & Wrench]

One of the handles on a scythe.

 

[mixerfixer]

Wheel studs and nuts on older class 8 sized trucks with stud piloted budd wheels

 

[cheechi]

business end of a string trimmer.

 

[MJD1]

Acetylene fittings, Budd wheels, load binders and farm machinery like disc harrow gangs

 

[Morrison]

The scented wall plug in things have left hand threads.

 

[VoodooCLD]

The right hand pedal on a bicycle is left hand threaded so it doesn't unscrew it self while you're peddling.

 

[cliftonbros89]

The left hand gauge wheels on Kinze planters. At least our older Kinze 3500. Guess they thought they may loosen up while going through the field.

We don’t have that problem on our JD 1990 air drill though. The gauge wheels are on the left and they have right hand threads.


Sent from my iPhone using Tapatalk

 

[3798j]

The right hand pedal on a bicycle is left hand threaded so it doesn't unscrew it self while you're peddling.

It's actually the left side pedal that is left hand threaded...if either left or right pedal isn't installed tightly, the pedaling motion will cause them to unthread.

 

[6768rogues]

There once was a whale named Moby ****,
who was cursed at birth with a cork-screw *****.
In every ocean he did hunt,
to find a whale with a cork-screw c _ _ t.
At last he found her, but he soon dropped dead…

Son-of-a-*****!!!

Left-hand thread!!!

Down from the hills came Two Gun Pete
with 29 inches of dangling meat.
Pete was fast, Pete was quick,
Pete was the man with a corkscrew D___
All his life on a royal hunt
in search of a girl with a corkscrew C___
When he finally found her, old Pete dropped dead,
the dirty B____ was a left hand thread!

 

[bwringer]

Draincock on radiator

Now that's just plain evil...



As noted by several others, one end of any link rod arrangement is left-hand threads, so it always takes a few extra seconds of ponderment to adjust or reassemble these.



I never understood the logic behind why some old vehicles had left-handed wheel stud threads. There's no rotational force that could unscrew them (if they do loosen, it's from stretching and vibration, and the thread direction is irrelevant).

The only thing I could think of is that perhaps they were trying to make things easier for a very specific type of ***** -- the kind of goober who will place a lug wrench on a nut and then yank the same direction even if he's on the other side of the car. Perhaps some long-dead engineer or executive was just this sort of *****, so millions of others had to suffer.

I remember seeing kits with new studs and nuts to convert the left-hand threaded side of your vehicle to right-hand threads.

 

[lilredex]

All 60s (70s?) Chrysler products. Not sure when they changed.

My guess is 1965.....when they also ditched those stupid tapered rear axles.

I had a 1966 Sport Fury and pretty sure it did not have tapered axles.

 

[LS6 Tommy]

Anything that has left hand thread.

Tommy

 

[PT Doc]

I can’t believe no one mentioned lawn mower blades.
Also one end of a dual motor spa pump.

My 2 Honda mowers were not oh threads.

 

[ER70S-2]

My 2 Honda mowers were not oh threads.

Mine is also RH thread. Hasn't flown off yet!

 

[The Cobbler]

some air compressor drains

 

[Biff Lungren]

Water pump puller for early Saab 900's, 79-84(?),
also the pump was on top of the block so when it failed coolant has a straight shot to the oil,

 

[Worsedog]

Radiator cap on 17 D-max...the propellerheads out did themselves on that one...the question is "Why?"

I'd say you got to be kidding, but I know better. That said, that's ********. The engineer that thought that was a good idea and the manager that approved the design both should have been terminated.

 

[rohartman]

Porsche GT3 Cup Car wheel nut, just on one side tho the other side is RH, you just need to remember which side is what in a pit stop!

 

[rohartman]

I'd say you got to be kidding, but I know better. That said, that's ********. The engineer that thought that was a good idea and the manager that approved the design both should have been terminated.

My son is a Mechanical Engineer and I kid with him and tell him..Human is to error but to really mess things up takes an Engineer!
He doesn't find that as funny as I do.

 

[HOTFR8]

View media item 45169International trucks in Australia had left hand thread wheel nuts on the left hand side.

Ford F Series Trucks the same but only on the read end.

 

[Schurkey]

There once was a whale named Moby ****,
who was cursed at birth with a cork-screw *****.
In every ocean he did hunt,
to find a whale with a cork-screw c _ _ t.
At last he found her, but he soon dropped dead…

Son-of-a-*****!!!

Left-hand thread!!!

Down from the hills came Two Gun Pete
with 29 inches of dangling meat.
Pete was fast, Pete was quick,
Pete was the man with a corkscrew D___
All his life on a royal hunt
in search of a girl with a corkscrew C___
When he finally found her, old Pete dropped dead,
the dirty B____ was a left hand thread!

There once was a man named Fred
Who had a **** with a corkscrew-shaped head.
He searched and he hunted
And found a woman corkscrew-cunted...




...But alas for poor Fred, reverse-thread!

 

[Schurkey]

GM cars prior to the 1963 model year used LH lugs on the LH side of the car.

I remember a Pontiac with reverse threads on the left side. I didn't know it was all of GM at one time.

 

[Pwaley]

yeah, fan clutch on BMWs.

 

[dadsEH]

My talc bottle cap...gets me every time.

 

[bubinga]

the tension screw on the serpentine belt adjustment on a mazda.
Stanly plane blade advance screw.
Both have a shaft tat has right and left hand threads.

 

[frank2112]

Belt tensioner pulley on a 90's Holden / Buick V6. Lots of fun after I broke it because it wasn't common knowledge at the time.

 

[KenC]

I remember a Pontiac with reverse threads on the left side. I didn't know it was all of GM at one time.

I was wrenching a lot in the 60s. The only GM products I remember having LH lugs were some Pontiacs and Buicks. Never encountered a Chevy, olds or Cad with them.

First thing I did when I got my 56 Dodge 1/2T was to replace the bolts with studs, all RH. Hated the LH and bolts both.

 

[Alchymist]

Vises and other "centering" devices where both jaws have to move in opposite direction closing or opening. Shaft will have LH threads on one end, RH on opposite end.

 

[Show7d3]

LH discharge lawn tractor decks have LH threads on the blade bolts, at least the ones I've worked on. Some rear discharge decks have them too. I also recall working on some Kubota lawn tractors with LH threads on the LH blade bolt and RH threads on the right side. My parents had a 1970 Dodge Dart with LH lug nuts on the left side.

 

[Ji m]

Threads on one side of my 53 Dodge,
and Power-Lok case screws (as others have said).
Also some ring gear bolts have left handed threads.


If your not sure if you have LH or RH bolts on something,
put two wrenches on two bolts next to one another.

Pull the wrenches towards each other (trying to spin one left, the other right),
the bolt moving in the correct direction to loosen *should* loosen before the one you are tightening breaks.

^I figured this out AFTER breaking a ring gear bolt in a Chrysler 8.75 gear set.

 

[MikeF2316]

Volvo had a a/c condenser fan motor on the 740 series that had a left hand 8mm nut holding the blade assembly on.

I also learned the Fred based version of the limerick.

 

[340wedge]

1971 Plymouth Duster. One side of the car on these are left handed thread lug nuts.

 

[hchinaski]

DeWalt radial arm saw arbor nut

BMW fan clutch

rose joint end on the accelerator linkage for a 91 BMW M5 S38B36 engine, that I managed to mangle. Took a while to find a reverse thread M6 tap!

 

[rharman]

Flywheel and sprocket nut on my 1972 Husqvarna 250.

Oh yeah, toilet handles too.

 

[bubinga]

Flywheel and sprocket nut on my 1972 Husqvarna 250.

Oh yeah, toilet handles too.

yeah, motor to Ft primary motor sprocket, 0n my 02 Sportster, 1200CC

 

[Cee3PeeOh]

As I remember some left handed threads had the grooved hex heads like this.

Acetylene torch fittings have left handed threads.